Audio: Add Dolby MAT format

Dolby MAT is a transport for encapsulating Dolby TrueHD access
units, channel-based PCM or object audio PCM. Dolby MAT's
primary use case is for HDMI transmission in which MAT is
encapsulated in IEC61937 frames as per IEC61937-9 specification.

Re-format switch / case indentation for modified switch statements
to satisfy new formatting rules.

Bug: 117566604
Test: make
Change-Id: I7c4f47e39a55bfbf13dfe401cf885dff858fa464