leaudio: Synchronize TBS and LeAudio

With this path, TBS notifies LeAudio if there is any call in any state.
With this information, LeAudio code can take better choices beased on
content type in the metadata update"

Bug: 232902624
Test: atest BluetoothInstrumentationTests
Tag: #feature
Change-Id: I13b2bea1cd8299584f950e3ff3374ee2f4be5edb