bluetooth: Add AudioSession/Control methods for AIDL track metadata

Add overloads for UpdateSink/SourceMetadata that
accept android.hardware.audio.common.Sink/SourceMetadata types.
Move include of hardware/audio.h to BluetoothAudioSession.cpp.
This allows to use this code from "pure AIDL" modules.

Bug: 228804498
Test: m
Change-Id: Ib0b8c6d1c7db9b846a508d6d4001f67feb2111c6
(cherry picked from commit d5f0d13e)
Merged-In: Ib0b8c6d1c7db9b846a508d6d4001f67feb2111c6