[DX-2622] fix: android custom tabs version, build immutable android library as aar

[nattb8]

Summary

• Change Chrome Custom Tabs version to 1.5.0 so the compileSdkVersion can be 33
• Import ImmutableAndroid as an .aar file instead of including it as a library .androidlib. so build tools version is not hardcoded
• Updated sample app to not include ImmutableActivity and CustomTabsService in AndroidManifest.xml as they are not required

Customer Impact

• Customers can now set the compileSdkVersion to API 33 on Unity 2022+

Other things to consider:

• Sample app is updated with new SDK changes
• Updated public documentation with new SDK changes (Immutable X and [Immutable zkEVM] (https://docs.immutable.com/docs/zkEVM/sdks/unity)) https://github.com/immutable/docs/pull/809
• Sample game is updated with new SDK changes