audio_hal_interface: Inject a2dp dependencies through BluetoothAudioPort

Implements the following methods:
  - StartStream: invoke AVDTP start if the stream is not already started
                 and neither SCO nor ISO are active
  - SuspendStream: invoke AVDTP suspend if the stream is not already suspended
  - SetLatencyMode: configure the latency mode

Removes the dependency from audio_hal_interface to:
  - bluetooth::headset::IsCallIdle
  - hci::IsoManager::GetInstance
  - hci::IsoManager::GetNumberOfActiveIso
  - btif_av_stream_started_ready
  - btif_av_stream_ready
  - btif_av_stream_start_with_latency
  - btif_av_stream_suspend
  - btif_av_clear_remote_suspend_flag
  - btif_av_set_low_latency

Bug: 365022887
Flag: EXEMPT, no logical change
Test: m com.android.btservices
Test: Manually validate a2dp sofware and offload paths
Change-Id: Ie240f60d1ae79e91d99412c2cd82750487648290