Revert "audio: Use hardcoded r_submix configuration with XML" am: 567d0de485

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2786754

Change-Id: I5bf9cf0ed6f0b04aea5c06d6cb5bd8c1e863a258
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>