audio: Add AUDIO_FORMAT_DEFAULT to supported formats (V6) am: 50bf1116fc am: 12b2c93b10 am: bd701ebc51 am: ee5066c40d am: b74c11d1c7 am: fed4333e43 am: 65441f950c am: d05c9d3e3f

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

Change-Id: I202eb924c7ee57a88e203475130479c6fa6dee8d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>