Chromecast: adds external_video_surface_java target.

This was split out awhile ago (https://codereview.chromium.org/1123993002),
so Android Cast builds have probably been broken @ TOT (runtime) since then.

R=halliwell@chromium.org,alokp@chromium.org
BUG=None

Review URL: https://codereview.chromium.org/1149823007

Cr-Commit-Position: refs/heads/master@{#332945}
1 file changed