Revert "Convert Keyguard tests to Robolectric tests"

This reverts commit cff46f1fa046d772dbef6e8a326dc46acc75f60f.

Reason for revert: errorprone broken with RequiresPermissionChecker, will revert the revert with the fix

Change-Id: I9366e6d5139c447b73d3479927a9350d7793a06f
32 files changed