CameraITS: various ITS improvement

1. run_all_tests.py now don't require a camera id argument.
   The script now iterate through all cameras automatically.
2. run_all_tests.py will now repeat capturing a image for
   user to visually check if current device placement is good
   for ITS testing. This should help front camera test since
   front camera will be facing test scene.
3. CtsVerifier will now save ITS test summaries and reported
   errors.
4. Enable pass button if all cameras on device are legacy level.

Change-Id: Ic8740f65dbaa67b0dc2d2aa8737355c0dffe1b6f