[automerger skipped] Audio : Fix minor comments in r_submix module am: 50f20657 -s ours

am skip reason: Merged-In Id7a30e0697da80a272768bbf2aa8e3ed748e93f4 with SHA-1 7770c158 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/24287961



Change-Id: I6b1e72c9aca2ff3a316f43153f3f9ca6a3f575ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>