Set standby as false when the stream is started successfully. am: 041a7d90dd

Original change: https://android-review.googlesource.com/c/platform/hardware/libhardware/+/2572211

Change-Id: I7598ebc20335e4e92760a86bc5dc94877cca7a9b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>