[automerger skipped] audio flinger: fix initial mmap stream volume am: 4c2392b6 -s ours

am skip reason: Merged-In If4654c1d9ea7fd109a8ab2b9b2431db71b966243 with SHA-1 bc02c6b0 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/24324782



Change-Id: I299233b73614dc0588cf998de6a534b071e7c7a6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>