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The codec API specifies that when starting streaming, the OUTPUT queue
should start first, followed by the CAPTURE queue. However it can happen
in some reset scenarios that CAPTURE buffers are queued ahead of OUTPUT
buffers, which results in the CAPTURE queue starting first. Fix this by
only allowing the CAPTURE queue to start if the OUTPUT queue is already
streaming.

BUG=b:111670886
TEST=Checked that VDA unittest was passing on Hana and Cheza.

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: Id27b5202dc6f910880e52099773df26e73a50304
Reviewed-on: https://chromium-review.googlesource.com/1212211
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589479}