Use waitForMovement in DRM tests.
Use waitForMovement in DRM tests.

This could help test failures on Windows since the video doesn't start
playing after the 5 seconds.  If it fails, we'll also get more
debug information for it.

Bug: 146050219
Change-Id: I1be5156350a591762022664feb05975470bbf92d

tvoli/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player