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

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

Change-Id: Iaef96ecad4e88f74ca34341a1999841ab49f3e07
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>