[Android] Disable PauseResumeTest for runtime client

As the XWalkView now doesn't relies on embedders to
call onHide/Show and pause/ResumeTimer when Activity
state changes.
The onPause/onResume callback in XWalkRuntimeClient is
now empty. We need to find another solution to
actually pause/resume the Activity to test the case.

Disable the test before that.

BUG=