[le audio] Bass scanning with ScanController

Current Bass scan is using framework API, this is unnecessary step from Bluetooth service
and has negative scanning performance impact.
Also this caused the scan permission check failed due to location off.

This CL is to use internal ScanController for Bass scanning to resolve
those issues, and simplify the scan callback handlers synchronization.

Bug: 392953619
Bug: 390317404
Flag: com.android.bluetooth.flags.leaudio_bass_scan_with_internal_scan_controller

Test: atest BassClientServiceTest
Test: manual test with broadcast scanning and confirm scan result received with location off
Change-Id: Ie178394e3032aa9c89ffbf969c1c5c89fbb281db