audio: Provide code for parsing surround sound config from XML am: aa8f76af92 am: 373c6167f0

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

Change-Id: Icd8e4ac62923cf0f4f7c1b80ef61e499e61a0f2f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>