audio: Add AUDIO_FORMAT_DEFAULT to supported formats (V6) am: 50bf1116fc am: 12b2c93b10 am: bd701ebc51 am: ee5066c40d am: b74c11d1c7 am: fed4333e43

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2989191

Change-Id: Id3e39ff0ebd3fef83e4c3a8bd5ac941fbbf6993f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>