invalid

this plugin is invalid!

```
$ flutter doctor -v
[✓] Flutter (Channel dev, v0.8.0, on Mac OS X 10.13.1 17B1003, locale zh-Hans-CN)
• Flutter version 0.8.0 at /Library/Java/flutter
• Framework revision a74f591d0c (4 weeks ago), 2018-09-04 17:12:24 +0100
• Engine revision de4c7a53f2
• Dart version 2.1.0-dev.3.0.flutter-760a9690c2

[✓] Android toolchain - develop for Android devices (Android SDK 27.0.3)
• Android SDK at /Library/Java/android-sdk-macosx
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-28, build-tools 27.0.3
• ANDROID_HOME = /Library/Java/android-sdk-macosx
• Java binary at: /Library/Java/JavaVirtualMachines/jdk1.8.0_152.jdk/Contents/Home/bin/java
• Java version Java(TM) SE Runtime Environment (build 1.8.0_152-b16)
• All Android licenses accepted.

[✓] iOS toolchain - develop for iOS devices (Xcode 9.2)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 9.2, Build version 9C40b
• ios-deploy 2.0.0
• CocoaPods version 1.5.3

[✗] Android Studio (not installed)
• Android Studio not found; download from https://developer.android.com/studio/index.html
(or visit https://flutter.io/setup/#android-setup for detailed instructions).

[✓] IntelliJ IDEA Ultimate Edition (version 2018.2.4)
• IntelliJ at /Applications/IntelliJ IDEA.app
• Flutter plugin version 27.0.3
• Dart plugin version 182.3569.4

[✓] Connected devices (4 available)
• M10 • 0123456789ABCDEF • android-arm • Android 7.0 (API 19)
• Android SDK built for x86 • emulator-5554 • android-x86 • Android 7.1.1 (API 25) (emulator)
• iPhone • c3126f0d53ffc64126eede537bbb35c4d005c2ce • ios • iOS 12.1
• iPhone X • 5566700A-FF74-438C-962E-D203F68924C3 • ios • iOS 11.2 (simulator)

! Doctor found issues in 1 category.

```

Start by reproducing the reported state with `flutter doctor -v` in the flutter_android_pip repository. The issue names no source file, failing test, error message, or expected behavior, so maintainer clarification is needed before a newcomer can define what done looks like.

Written by the indexing model from the issue text.