Bluetooth Audio HAL interface v2

Generalized Bluetooth Audio HAL interface.
It is similar to the original android.hardware.bluetooth.a2dp@1.0
interface with the following modifications:

* The session type can be one of the following:
  - A2DP Software Encoding Datapath
  - A2DP Hardware Encoding Datapath
  - Hearing Aid Software Encoding Datapath
* For Hardware Offload Datapath (A2DP), the HAL interface is used only
  for the control path
* For Software Encoding Datapath (A2DP or Hearing Aid), the HAL
  interface is used for both the control and data paths
* Added Delay Report support: IBluetoothAudioHost.getPresentationPosition()
  that was missing in the original android.hardware.bluetooth.a2dp@1.0
  HAL interface.
* Removed "oneway" calls to avoid potential reordering of HAL calls:
  b/111244402
* Updated SBC-specific codec configuration
* Added AAC-specific and LDAC-specific codec configuration
* Reorganized the original CodecConfiguration into two sections:
  - PcmDataConfiguration: Audio PCM data configuration
  - EncodedDataConfiguration: Encoded audio data codec configuration.
    It is used only if the HAL is responsible for encoding the PCM audio
    data.
* Added new HAL IBluetoothAudioProvidersFactory.
  It is used to open an audio provider for an audio session as specified by
  the session type and the codec configuration as negotiated with the
  remote device.

Bug: 111519504
Test: manual
Change-Id: I2ee4cf50b177baee077cf0b5143dbeadda57c8fb