audio: Provide code for parsing surround sound config from XML am: aa8f76af...

audio: Provide code for parsing surround sound config from XML am: aa8f76af am: 373c6167 am: 628e53a3 am: 1016c689 am: f73f449b am: e1ab31b6

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2593365



Change-Id: I6c3470058b01ba4a5aed97157df9660751d3ac38
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>