Revert "audio: Use hardcoded r_submix configuration with XML" am: 567d0de485 am: a37a4feed2 am: 3727401bcb

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

Change-Id: I080214e99acae9276c5662e4ccbe93a7a17f9848
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>