[Audiosharing] Use LE audio profile as fallback to get group id.

For non-CSIP LE audio device, use LE audio profile to get group id.

Also, did some refinement in this change.
1. Add more log
2. Use context#getMainExecutor instead, since postOnMainThread is
   deprecated.

Test: manual
Bug: 305620450
Bug: 319723439
Change-Id: I8056b2e7b6ab37915a518ad2290a0a7fb7671c18