Revert "servicestests and InputTests: allow warnings"

Revert submission 3495771-upgrade-mockito

Reason for revert: DroidMonitor: Potential culprit for http://b/397508359  - verifying through ABTD before revert submission. This is part of the standard investigation process, and does not mean your CL will be reverted.
Reverted changes: /q/submissionid:3495771-upgrade-mockito

Change-Id: Ia26942ea855f0a7e9e4ff5230dcc19b7fd0fab37