Enable PhotoPicker tests in presubmit

* Add e2e test for photopicker uri for single select flow.
* Remove @Rule as we want different setup for different tests.
* Remove @Ignore to add presubmit coverage.
* Add generic test for gif and video. Follow up CLs will have more
tests.

Bug: 168785304
Test: atest PhotoPickerSingleSelectTest
Change-Id: I612c9c7fe1b5ca2c602fc405f3adff97d6afbd68
Merged-In: I612c9c7fe1b5ca2c602fc405f3adff97d6afbd68
(cherry picked from commit fdd2eb01185c8910c810f75b62c85669a94037cc)
2 files changed