Capture/Replay: Capture TexSubImage2DRobustAngle, enable tests The tests RobustClientMemoryTest.* now all pass. Bug: angleproject:6108 Change-Id: I980c1fd9e065cb5c4ed575770f86e09faeb19d4c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2988685 Commit-Queue: Gert Wollny <gert.wollny@collabora.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com>