Are we all on AndroidX?

[ghenry]

flutter run
Launching lib/main.dart on SM G970F in debug mode...
Initializing gradle...                                              0.7s
Resolving dependencies...                                           1.4s
                                                                        
FAILURE: Build failed with an exception.                                
                                                                        
* What went wrong:                                                      
Execution failed for task ':app:transformResourcesWithMergeJavaResForDebug'.
> More than one file was found with OS independent path 'META-INF/proguard/androidx-annotations.pro'
                                                                        
* 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 3s                                                      
Running Gradle task 'assembleDebug'...                                  
Running Gradle task 'assembleDebug'... Done                         3.9s
AndroidX incompatibilities may have caused this build to fail. 
Please migrate your app to AndroidX. See https://goo.gl/CP92wY.
Gradle task assembleDebug failed with exit code 1

[ghenry]

This is on:

commit 8e42b5991bfd558716735b6be91efec1ea5be940 (HEAD -> master, origin/master, origin/HEAD)
Author: CloudWebRTC <duanweiwei1982@gmail.com>
Date:   Thu Sep 26 22:04:56 2019 +0800

    Remove the extra route and fix the DialPadWidget instance to be created repeatedly.

[ghenry]

Running flutter doctor...
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v1.10.7-pre.73, on Linux, locale en_GB.UTF-8)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Linux toolchain - develop for Linux desktop
[✓] Android Studio (version 3.5)
[✓] Android Studio (version 3.4)
[✓] VS Code (version 1.38.1)
[✓] Connected device (2 available)

[ghenry]

Works ok on stable channel:

[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Linux, locale en_GB.UTF-8)
 
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] Android Studio (version 3.5)
[✓] Android Studio (version 3.4)
[✓] VS Code (version 1.38.1)
[✓] Connected device (1 available)

[cloudwebrtc]

It looks like an Android compatibility issue. I found this:
https://flutter.dev/docs/development/packages-and-plugins/androidx-compatibility