GitLab

This adds parsing of the VUI and methods for returning size and
colorspace information based on the SPS.

BUG=chromium:1141237,b:153111783
TEST=media_unitests, media_h265_parser_fuzzer

Change-Id: I6959bf7706183f5239a91ea201effeed9a735dfb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2495838Reviewed-by: Sergey Volk <servolk@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Jeffrey Kardatzke <jkardatzke@google.com>
Cr-Commit-Position: refs/heads/master@{#821474}