Merge "Add AUDIO_FORMAT_MAT to the list of formats in XSD V6" am: fa085b5a9e am: 241e5a49ad am: ae086a0302

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1559800

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5b4f1b3b7e3fcf5574994152c9310ac2e1ea89e3