Bug 1054326: Initial attempt to submit Imagecompare test framework and test cases int...

...o the main branch
yes actually, gallery and a couple apps do have the fullscreen view, but depending on the UI action the status bar can always reappear, so I decided to make it simple.  If you think it's a better idea to not crop when it's in fullscreen view, I guess I can check for whether the System._status_bar_locator is displayed?