Camera API1: Fix ZSLProcessor3 deadlock

ZSLProcessor3 shouldn't acquire mInputMutex in onBufferReleased call for output
buffers, because the caller (Camera3Stream::returnBuffer) holds the camera3
stream lock already. This could cause deadlock for ZSL reprocess request as it
holds the ZSLProcessor3 input lock and try to acquire camera3 stream lock to
submit the request.

Bug: 17299038
Change-Id: I6a7bf8ebd7c2064852358c655f3a3e9a67769213