Move ActivityThreadTests to presubmit

Also fix two tests due to recent changes.
- Not reporting #onConfigurationChanges for window configuration
  changes after 13816978
- Not reporting #onConfigurationChanges for same configuration bucket
  after 13844692

Bug: 169550676
Test: atest ActivityThreadTests
Change-Id: Ia9dbf0f92716619d701acd8dec3478cc17cddee3