[DO NOT MERGE]Revert "Migrate KeyguardClockSwitch to new shared Clock library"

Revert "Expose the clock version of google-sans"

Revert "Changes to SystemUIGoogle to support clock migration"

Revert submission 19451291-cherrypick-clock_migration-tvip0m638i

Reason for revert: b/241084042
Reverted Changes:
Ia053aaec6:Migrate KeyguardClockSwitch to new shared Clock li...
Ia3e067b93:Changes to SystemUIGoogle to support clock migrati...
I5dbf01a83:Add clock version of google-sans
Ia654d4f41:Expose the clock version of google-sans

Change-Id: I432d3d814c85b9ba20bbb7a88d2e52bd2337c10c