Fix Yet More Theme Test Stuff

Bug 5404694

These fixes make ActivitySnapshotTests pass...but not
SplitActivitySnapshotTests.

- Add back the orientation check to retry the test if the orientation
  doesn't match.

- Add an orientation check on the generated bitmap to make sure that
  the bitmap was produced after the orientation was changed.

- Add some retry logic to get around how some widget in the layout
  was randomly getting focus.

Change-Id: Iea7173fd063a7f0f3ed63c6d41c0ed66449653dd