Merge "libaudiohal: Remove unused protected methods from StreamHalAidl" am: ed74d22479 am: b04b4fe0e0 am: 1eeadbc160

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2532759

Change-Id: I9b466cc641deeb065d0882f83618d9b1429c36a0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>