Android: Always update SurfaceTexture when used

This basically causes it to get updated from
glCopyTextureCHROMIUM() also which is used with
canvas/webgl.

BUG=309162

Review URL: https://codereview.chromium.org/148513004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@247699 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 247699