Add CheckFlagsRule to tests with `@RequiresFlags[Enabled|Disabled]`

To enable Global lint CheckFlagsRuleDetector, we need to first fix
(or baseline) all existing errors.

For context on the development of this new lint, see b/430031210.

Bug: 435371380
Test: m .
Flag: EXEMPT test change
Change-Id: Ie03a9a25161f8b70f5a8432d43cbf554d39d1686