media/mojo: VideoFrame STORAGE_DMABUFS fix for protected MT2T

As part of b/339091167, minigbm changed its allocation of protected MT2T
surfaces. They are allocated as true 10bpp rather than as 16bpp. They
are represented by the P016LE format in Chrome, so the buffer
validations need to deal with mismatched buffer strides.

This adds a special case to the STORAGE_DMABUFS handler for the case of
protected MT2T buffers.

Bug: b:400455683
Change-Id: I13ac7b006ca1408db634de1b8ea33be4c6f71481
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6426608
Reviewed-by: Jeffrey Kardatzke <jkardatzke@google.com>
Reviewed-by: Elly FJ <ellyjones@chromium.org>
Commit-Queue: Nathan Hebert <nhebert@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1447424}