audio: Add AUDIO_FORMAT_DEFAULT to supported formats (V6) am: 50bf1116fc am: 12b2c93b10 am: bd701ebc51 am: ee5066c40d am: d703b973c8 am: 830e8db7df

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

Change-Id: I1a732d53ec725802e9f1a131f96b7772a7ae41b1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>