Run Mono Android sample on Helix

[MaximLipnin]

• Included the android sample project to the library test build.
• Added copying resulting HelloAndroid.apk to helix test directory from where it can be consumed by CI.
• Set up the return value (42) as an expected exit code for xharness.
• Xharness for android doesn't support running an application w/o test runner yet

Related issue: #43865

[MaximLipnin]

At the moment it requires arcade helix sdk bump to, at least, version="6.0.0-beta.20576.1".

[MaximLipnin]

According to the CI log, the sample runs as expected:

[09:04:12] info: Starting instrumentation class 'net.dot.MonoRunner' on net.dot.HelloAndroid
[09:04:12] dbug: Raw command: 'shell am instrument  -w net.dot.HelloAndroid/net.dot.MonoRunner'
[09:04:12] dbug: Executing command: '/home/helixbot/work/AD54095B/p/microsoft.dotnet.xharness.cli/1.0.0-prerelease.20602.1/runtimes/any/native/adb/linux/adb -s emulator-5556 shell am instrument  -w net.dot.HelloAndroid/net.dot.MonoRunner'
[09:04:14] info: Running instrumentation class net.dot.MonoRunner took 1.9247861 seconds
[09:04:14] dbug: Exit code: 0
                 Standard Output:
                 INSTRUMENTATION_RESULT: return-code=42
                 INSTRUMENTATION_CODE: 42
                 
                 
[09:04:14] info: Instrumentation finished normally with exit code 42
[09:04:17] dbug: Executing command: '/home/helixbot/work/AD54095B/p/microsoft.dotnet.xharness.cli/1.0.0-prerelease.20602.1/runtimes/any/native/adb/linux/adb -s emulator-5556 logcat -d '
[09:04:22] info: Wrote current ADB log to /home/helixbot/work/AD54095B/w/AD740982/uploads/adb-logcat-net.dot.HelloAndroid.log
[09:04:22] info: Attempting to remove apk 'net.dot.HelloAndroid': 
[09:04:22] dbug: Executing command: '/home/helixbot/work/AD54095B/p/microsoft.dotnet.xharness.cli/1.0.0-prerelease.20602.1/runtimes/any/native/adb/linux/adb -s emulator-5556 uninstall net.dot.HelloAndroid'
[09:04:22] info: Successfully uninstalled net.dot.HelloAndroid.
XHarness exit code: 0

[steveisok]

@akoeplinger Please give this a review

[MaximLipnin]

runtime-staging (Build Android x64 Release AllSubsets_Mono) looks good now.