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
Merged-In: I13b2bea1cd8299584f950e3ff3374ee2f4be5edb
Change-Id: I13b2bea1cd8299584f950e3ff3374ee2f4be5edb
(cherry picked from commit 7aa16ed0)