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

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



Change-Id: Icb3ac2c283e3dfee68c2e9e65fc00d757d0c3583
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>