The Android SurfaceTexture API has to be initialized with a texture id
which Chrome has to query from an ANGLE external texture. It also
rebinds and sets the texture dimensions on calls to
SurfaceTexture.updateTexImage so ANGLE must be notified about these
changes so that state tracking and validation continue to function.

BUG=967410

Change-Id: I92e9077f75835b088da3a8caffb3ff40e9ad0361
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1630293
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>