[Fuchsia] Temporarily disable video decoder.

Disable for a firm transition of Fuchsia codec API.

Change-Id: I106386923206ce04849e60d33928226e6461d02a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1497187
Reviewed-by: Dan Sanders <sandersd@chromium.org>
Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Commit-Queue: Payton Turnage <turnage@google.com>
Cr-Commit-Position: refs/heads/master@{#640591}
2 files changed