APK Build fails with Flutter 1.7.0 or even v.1.5+

see below ...

```
Initializing gradle... 0.8s
Resolving dependencies... 1.4s
**Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: /Users/dev/.pub-cache/hosted/pub.dartlang.org/flutter_webview_plugin-0.3.5/android/src/main/java/com/flutter_webview_plugin/WebviewManager.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
D8: Program type already present: android.support.v4.os.ResultReceiver$1**

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:transformDexArchiveWithExternalLibsDexMergerForRelease'.
> com.android.builder.dexing.DexArchiveMergerException: Error while merging dex archives: /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/31.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/32.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/33.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/34.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/35.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/36.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/37.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/38.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/39.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/40.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/41.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/42.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/43.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/44.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/45.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/46.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/47.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/48.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/49.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/50.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/51.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/52.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/53.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/54.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/55.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/56.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/57.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/58.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/59.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/60.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/61.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/62.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/63.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/64.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/65.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/66.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/67.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/68.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/69.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/70.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/71.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/72.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/73.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/74.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/75.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/76.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/77.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/78.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/79.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/80.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/81.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/82.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/83.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/84.jar, /Users/dewang/wsumobileapps/western-sydney-mobile-app/build/app/intermediates/transforms/dexBuilder/release/85.jar

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

* Get more help at https://help.gradle.org

BUILD FAILED in 49s
Running Gradle task 'assembleRelease'...
Running Gradle task 'assembleRelease'... Done 49.7s
*******************************************************************************************
The Gradle failure may have been because of AndroidX incompatibilities in this Flutter app.
See https://goo.gl/CP92wY for more information on the problem and how to fix it.
*******************************************************************************************
Gradle task assembleRelease failed with exit code 1
```

Beginne damit, den Release-Build mit den gemeldeten Flutter- und Plugin-Versionen zu reproduzieren, und untersuche anschließend die Auflösung der Android- und Gradle-Abhängigkeiten im Zusammenhang mit der doppelten Klasse android.support.v4.os.ResultReceiver. Bestätige, ob der Fehler durch eine AndroidX-Inkompatibilität oder durch doppelte Support-Bibliotheken verursacht wird; abgeschlossen ist die Aufgabe, wenn assembleRelease erfolgreich abgeschlossen wird.

Vom Indexierungsmodell aus dem Issue-Text verfasst.