Adds a timeout to the dequeue input buffer call. This improves stability because WebRTC quickly queues frames multiple when the call starts. This might cause the decoder to run out of input buffers. Waiting for dequeueOutputBuffers call is no longer necessary. Bug: webrtc:7760 Change-Id: I503ff1cf44042c4d8610077090148d9dfef169f5 Reviewed-on: https://chromium-review.googlesource.com/548357 Reviewed-by: Bjorn Mellem <mellem@webrtc.org> Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#18800}