audio: Add AUDIO_FORMAT_DEFAULT to supported formats (V6) am: 50bf1116fc am: 12b2c93b10 am: bd701ebc51 am: ee5066c40d am: d703b973c8 am: 64f47fac54 am: 96cf33a61e am: a9750a0c4a

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

Change-Id: I95e8e329b8142a4446e4e0281b70f456503f250f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>