[ScanController] Bypass scan permission check for internal clients

For Bluetooth app internal clients, ScanController should bypass the
permission checks.

Bug: 392953619
Bug: 390317404
Bug: 388256657
Flag: com.android.bluetooth.flags.leaudio_bass_scan_with_internal_scan_controller
Test: atest ScanControllerTest
Test: manual test with broadcast scanning and confirm scan works when
location is off

Change-Id: Ic60df7dff663eaf8aa221434cd9ecd548a22bd8f