Clean up lint warnings to unblock #6868

[Sangamesh1997]

The Android build is failing due to lint warnings and also other warnings (ObsoleteSdkInt, InlinedApi, NewApi)
This issue is being created to track the lint cleanup work that needs to be completed first.

[Sangamesh1997]

Closing the issue as per discussion - handling the lint warnings updates directly in the PR #12143