Merge "Flush output buffers when command is complete" into main am: d3485542

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2882963



Change-Id: I35790bf664a02d92b91d324622be8d98c0cd6320
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>