Add getCodecCapabilities as a supported function.

Add the ability to get a list of supported codecs and their capabilites
through the HIDL interface.

Bug: 111519504
Test: Compile
Change-Id: I61dff240a98d59cb99b526d8988d0d0245140ee4
diff --git a/bluetooth/audio/2.0/IBluetoothAudioPort.hal b/bluetooth/audio/2.0/IBluetoothAudioPort.hal
index 17d13b8..fedc8d3 100644
--- a/bluetooth/audio/2.0/IBluetoothAudioPort.hal
+++ b/bluetooth/audio/2.0/IBluetoothAudioPort.hal
@@ -27,6 +27,9 @@
  *
  * Moreover, the Audio HAL can also get the presentation position of the stream
  * and provide stream metadata.
+ *
+ * Note: For HIDL APIs with a "generates" statement, the callback parameter used
+ * for return value must be invoked synchronously before the API call returns.
  */
 interface IBluetoothAudioPort {
     /**