audio: Disable the C++ backend for android.hardware.audio.core am: f84d640186 am: 0dee516d06

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/2194570

Change-Id: Ib5b37ba19757ff33d13ba4bcf339d50c0a7b1e49
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>