Passing compile sdk lower than 28 fails build with tns-android@next

CLI: 5.0.0-2018-10-16-12488 (RC)
Android Runtime: 5.0.0-2018-10-23-165909-01

The new android runtime requires sdk 28. If you build such project with tns build --compileSdk 27 the build will fail with error for missing resources. We need a check in that case and warning that you cannot build project with last android runtime with sdk lower than 28.

Steps:

1. tns create TestApp --js
2. tns platform add android@next
3. tns build android --compileSdk 27

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:processDebugResources'.

Android resource linking failed
Output: D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v28\values-v28.xml:7: error: resource android:attr/dialogCornerRadius not found.
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v28\values-v28.xml:11: error: resource android:attr/dialogCornerRadius not found.
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values\values.xml:1153: error: resource android:attr/fontVariationSettings not found.
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values\values.xml:1154: error: resource android:attr/ttcIndex not found.
error: failed linking references.
Command: C:\Users\endarova.gradle\caches\transforms-1\files-1.1\aapt2-3.2.0-4818971-windows.jar\0925c6411c9bd9ae001a8948b7174069\aapt2-3.2.0-4818971-windows\aapt2.exe link -I
C:\Users\endarova\AppData\Local\Android\Sdk\platforms\android-27\android.jar --manifest\ D:\work\TestProjects\test3\platforms\android\app\build\intermediates\merged_manifests\debug\processDebugManifest\merged\AndroidManifest.xml-o\ D:\work\TestProjects\test3\platforms\android\app\build\intermediates\processed_res\debug\processDebugResources\out\resources-debug.ap_\ -R\ @D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\processDebugResources\resources-list-for-resources-debug.ap_.txt
--auto-add-overlay\ --java\ D:\work\TestProjects\test3\platforms\android\app\build\generated\not_namespaced_r_class_sources\debug\processDebugResources\r\ --custom-package\ org.nativescript.test3-0\apk--no-version-vectors
--output-text-symbols
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\symbols\debug\R.txt
--no-version-vectors
Daemon: AAPT2 aapt2-3.2.0-4818971-windows Daemon #0
Output: C:\Users\endarova.gradle\caches\transforms-1\files-1.1\appcompat-v7-28.0.0.aar\6a6559d0a9305ecc5ded117112c3f7db\res\values-v28\values-v28.xml:9:5-12:13: AAPT: error: resource android:attr/dialogCornerRadius not found.
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\mergeDebugResources\merged.dir\values-v28\values-v28.xml:11: AAPT: error: resource android:attr/dialogCornerRadius not found.
C:\Users\endarova.gradle\caches\transforms-1\files-1.1\design-28.0.0.aar\c1e5d15a6b9134a1e23aed70d9b09c4b\res\values\values.xml:161:5-202: AAPT: error: resource android:attr/fontVariationSettings not found.
C:\Users\endarova.gradle\caches\transforms-1\files-1.1\design-28.0.0.aar\c1e5d15a6b9134a1e23aed70d9b09c4b\res\values\values.xml:161:5-202: AAPT: error: resource android:attr/ttcIndex not found.
error: failed linking references.
Command: C:\Users\endarova.gradle\caches\transforms-1\files-1.1\aapt2-3.2.0-4818971-windows.jar\0925c6411c9bd9ae001a8948b7174069\aapt2-3.2.0-4818971-windows\aapt2.exe link -I
C:\Users\endarova\AppData\Local\Android\Sdk\platforms\android-27\android.jar
--manifest
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\merged_manifests\debug\processDebugManifest\merged\AndroidManifest.xml-o\ D:\work\TestProjects\test3\platforms\android\app\build\intermediates\processed_res\debug\processDebugResources\out\resources-debug.ap_\ -R\ @D:\work\TestProjects\test3\platforms\android\app\build\intermediates\incremental\processDebugResources\resources-list-for-resources-debug.ap_.txt--auto-add-overlay--java\ D:\work\TestProjects\test3\platforms\android\app\build\generated\not_namespaced_r_class_sources\debug\processDebugResources\r--custom-package org.nativescript.test3-0\apk
--no-version-vectors
--output-text-symbols
D:\work\TestProjects\test3\platforms\android\app\build\intermediates\symbols\debug\R.txt
--no-version-vectors
Daemon: AAPT2 aapt2-3.2.0-4818971-windows Daemon #0

首先创建一个应用并添加 android@next，然后复现 tns build android --compileSdk 27，接着跟踪 CLI 对 --compileSdk 的处理。完成的标准是检测到不兼容的 SDK/Runtime 组合并发出警告，而不是之后因缺少 Android 资源而失败。