Add Unit test for Custom Application

[dellis1972]

Context #2730

This commit adds a unit test to make sure that we can debug custom applications.
It did expose a slight issue with our enhanced fast deployment. One of the requirements for custom applications working is that the java classes for the custom app MUST be in the classes.dex file in the apk. As a result when using enhanced fast deployment, we can't load the application because not even the MultiDexLoader has been loaded. So for that to work will need to somehow figure out how to pick out just the custom app dependencies and put them into the apk.

All other development modes work fine, so we should add the tests anyway. We can updated the tests later once the enhanced fast deployment issue has been fixed.

[dellis1972]

Weird. In the Enhanced Fast Dev mode, CustomApplications do not work.

All the pieces are in place. But it seems despite the mono.android.MultiDexLoader being in place, the system still cannot find the custom application.

I guess it needs to be in the app :(

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="UnnamedProject.UnnamedProject">
  <uses-sdk android:minSdkVersion="24" android:targetSdkVersion="29" />
  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
  <application android:label="UnnamedProject" android:name="md52d9cf6333b8e95e8683a477bc589eda5.MyApplication" android:allowBackup="true" android:icon="@drawable/icon" android:debuggable="true">
    <activity android:icon="@drawable/icon" android:label="UnnamedProject" android:name="md52d9cf6333b8e95e8683a477bc589eda5.MainActivity">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <provider android:name="mono.android.MultiDexLoader" android:exported="false" android:initOrder="1999999999" android:authorities="UnnamedProject.UnnamedProject.mono.android.MultiDexLoader.__mono_init__" />
    <provider android:name="mono.MonoRuntimeProvider" android:exported="false" android:initOrder="1999999998" android:authorities="UnnamedProject.UnnamedProject.mono.MonoRuntimeProvider.__mono_init__" />
    <provider android:name="mono.android.ResourcePatcher" android:exported="false" android:initOrder="1999999997" android:authorities="UnnamedProject.UnnamedProject.mono.android.ResourcePatcher.__mono_init__" />
    <!--suppress ExportedReceiver-->
    <receiver android:name="mono.android.Seppuku">
      <intent-filter>
        <action android:name="mono.android.intent.action.SEPPUKU" />
        <category android:name="mono.android.intent.category.SEPPUKU.UnnamedProject.UnnamedProject" />
      </intent-filter>
    </receiver>
  </application>
</manifest>

Process: UnnamedProject.UnnamedProject, PID: 20937
08-21 17:40:54.751 20937 20937 E AndroidRuntime: java.lang.RuntimeException: Unable to instantiate application md52d9cf6333b8e95e8683a477bc589eda5.MyApplication: java.lang.ClassNotFoundException: Didn't find class "md52d9cf6333b8e95e8683a477bc589eda5.MyApplication" on path: DexPathList[[zip file "/data/app/UnnamedProject.UnnamedProject-w70tvDKkWRyPCr0o_vsJJg==/base.apk"],nativeLibraryDirectories=[/data/app/UnnamedProject.UnnamedProject-w70tvDKkWRyPCr0o_vsJJg==/lib/x86, /data/app/UnnamedProject.UnnamedProject-w70tvDKkWRyPCr0o_vsJJg==/base.apk!/lib/x86, /system/lib]]
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.LoadedApk.makeApplication(LoadedApk.java:1069)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5842)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.ActivityThread.access$1100(ActivityThread.java:199)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.os.Handler.dispatchMessage(Handler.java:106)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.os.Looper.loop(Looper.java:193)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.ActivityThread.main(ActivityThread.java:6669)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at java.lang.reflect.Method.invoke(Native Method)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "md52d9cf6333b8e95e8683a477bc589eda5.MyApplication" on path: DexPathList[[zip file "/data/app/UnnamedProject.UnnamedProject-w70tvDKkWRyPCr0o_vsJJg==/base.apk"],nativeLibraryDirectories=[/data/app/UnnamedProject.UnnamedProject-w70tvDKkWRyPCr0o_vsJJg==/lib/x86, /data/app/UnnamedProject.UnnamedProject-w70tvDKkWRyPCr0o_vsJJg==/base.apk!/lib/x86, /system/lib]]
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.AppComponentFactory.instantiateApplication(AppComponentFactory.java:50)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.Instrumentation.newApplication(Instrumentation.java:1120)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	at android.app.LoadedApk.makeApplication(LoadedApk.java:1061)
08-21 17:40:54.751 20937 20937 E AndroidRuntime: 	... 9 more

[dellis1972]

macOS PR Release failure is run-api-compatibility-tests FAILED, status: 2. That doesn't look related.

[jonpryor]

In the most recent AzDO rebuild, the emulator failed to start. :-(

Rebuilding: https://devdiv.visualstudio.com/DevDiv/_build/results?buildId=3046017&view=results

[dellis1972]

Designer tests are doing this Custom controls are not enabled in the test session, bailing out early.
It should not be related as this is just adding a unit test.