Merge "aaudio: clear data buffer before use" into sc-dev am: c52f8f4eaa am: a864b7403a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/av/+/14753194

Change-Id: I82f2fe16b50a1fe3750e5e8692b6a84b7bef84ff