[Mono.Android] Android API-R Developer Preview 2 Binding (#4468)

Context: https://web.archive.org/web/20200307182928/https://developer.android.com/preview/overview

Android 11 [Developer Preview 2 has been released][0].

  * [API diff vs. Developer Preview 1][1]
  * [API diff vs. API-29][2]

Google's documented timeline for Android 11 is unchanged wrt a20be39:

  * Developer Preview 3 in April
  * Beta 1 in May
  * Beta 2 in June
    This contains the final APIs and official SDK.
  * Beta 3 and final release sometime in Q3, 2019.

For a change vs. previous releases, we are testing out some new
workflows and tooling around enumification, and the updated API-R
binding in `Mono.Android.dll` v10.0.99 has been enumified.

Note: due to a [generator bug][3], the
`Android.OS.VibrationEffectEffectType` enum must be manually bound.

[0]: https://android-developers.googleblog.com/2020/03/android-11-developer-preview-2.html
[1]: https://developer.android.com/sdk/api_diff/r-dp2-incr/changes
[2]: https://developer.android.com/sdk/api_diff/r-dp2/changes
[3]: dotnet/java-interop#613

Author: gugavaro

build-tools/xaprepare/xaprepare/ConfigAndData/Dependencies/AndroidToolchain.cs

@@ -40,7 +40,7 @@ public AndroidToolchain ()
 				new AndroidPlatformComponent ("platform-27_r03",   apiLevel: "27", pkgRevision: "3"),
 				new AndroidPlatformComponent ("platform-28_r04",   apiLevel: "28", pkgRevision: "4"),
 				new AndroidPlatformComponent ("platform-29_r01",   apiLevel: "29", pkgRevision: "1"),
-				new AndroidPlatformComponent ("platform-R_r01",    apiLevel: "R",  pkgRevision: "1"),
+				new AndroidPlatformComponent ("platform-R_r02",    apiLevel: "R",  pkgRevision: "2"),
 
 				new AndroidToolchainComponent ("docs-24_r01",                                       destDir: "docs", pkgRevision: "1"),
 				new AndroidToolchainComponent ("android_m2repository_r47",                          destDir: Path.Combine ("extras", "android", "m2repository"), pkgRevision: "47.0.0"),

src/Mono.Android/Android.OS/VibrationEffectEffectType.cs

@@ -0,0 +1,14 @@
+namespace Android.OS
+{
+	public enum VibrationEffectEffectType
+	{
+		[global::Android.Runtime.IntDefinition ("Android.OS.VibrationEffect.EffectClick", JniField = "android/os/VibrationEffect.EFFECT_CLICK")]
+		EffectClick = 0,
+		[global::Android.Runtime.IntDefinition ("Android.OS.VibrationEffect.EffectDoubleClick", JniField = "android/os/VibrationEffect.EFFECT_DOUBLE_CLICK")]
+		EffectDoubleClick = 1,
+		[global::Android.Runtime.IntDefinition ("Android.OS.VibrationEffect.EffectTick", JniField = "android/os/VibrationEffect.EFFECT_TICK")]
+		EffectTick = 2,
+		[global::Android.Runtime.IntDefinition ("Android.OS.VibrationEffect.EffectHeavyClick", JniField = "android/os/VibrationEffect.EFFECT_HEAVY_CLICK")]
+		EffectHeavyClick = 5,
+	}
+}

src/Mono.Android/Mono.Android.csproj

@@ -183,6 +183,7 @@
     <Compile Include="Android.OS\Handler.cs" />
     <Compile Include="Android.OS\Message.cs" />
     <Compile Include="Android.OS\PowerManager.cs" />
+    <Compile Include="Android.OS\VibrationEffectEffectType.cs" />
     <Compile Include="Android.OS\Vibrator.cs" />
     <Compile Include="Android.OS.Storage\StorageManager.cs" />
     <Compile Include="Android.Opengl\GLSurfaceView.cs" />