Force generation of automation IDs in Uno.UI project

This is required for Xamarin.UITest to find the system templates elements by name.

build/android-uitest-run.sh

@@ -14,7 +14,7 @@ echo "Starting emulator"
 nohup $ANDROID_HOME/emulator/emulator -avd xamarin_android_emulator -skin 1280x800 -no-audio -no-snapshot > /dev/null 2>&1 &
 
 # build the sample and tests, while the emulator is starting
-msbuild /r /p:Configuration=Release $BUILD_SOURCESDIRECTORY/src/SamplesApp/SamplesApp.Droid/SamplesApp.Droid.csproj
+msbuild /r /p:Configuration=Release "/p:IsUiAutomationMappingEnabled=true" $BUILD_SOURCESDIRECTORY/src/SamplesApp/SamplesApp.Droid/SamplesApp.Droid.csproj
 msbuild /r /p:Configuration=Release $BUILD_SOURCESDIRECTORY/src/SamplesApp/SamplesApp.UITests/SamplesApp.UITests.csproj
 
 # Wait for the emulator to finish booting

src/Uno.UI/Uno.UI.csproj

@@ -29,6 +29,9 @@
 
 		<!-- Force the generation of upri files for Uno.UI self localization -->
 		<UnoForceProcessPRIResource>true</UnoForceProcessPRIResource>
+
+		<!-- Generate automation IDs in debug builds, use by UI tests. -->
+		<IsUiAutomationMappingEnabled Condition="'$(Configuration)'=='Debug'">true</IsUiAutomationMappingEnabled>
 	</PropertyGroup>
 
 	<Import Project="..\Uno.CrossTargetting.props" />