Install the Full Android Sdk on Helix Bots.

[dellis1972]

We have a requirement to test the integration of the ICorDebug Debugger and the .NET Android Sdk.
In order to meet this requirement, we need to be able to build .NET Android applications on the Helix bots themselves.
This is because some of the debug scenarios use tooling which is part of the build system. For example we would need to be able to run commands such as

dotnet build foo.csproj -c Debug -t:Install 
dotnet build foo.csproj -f netX.X-android -t:Run -p:AndroidAttachDebugger=true

Currently the Helix bots only include adb and emulator tooling. While those do allow us to install a full apk, it does not allow us to test the specific debugging path which side-loads assemblies.

Ideally we would like to be able to test this on Windows, Mac and Linux since those are all the platforms our customers use.
However I am aware that running the Android emulators on Windows can be problematic.

The planned release of the ICorDebug integration/switch is VS 17.14. Which I guess is scheduled for //build which is in May 2025.