Create screen off animation guard for generic ValueAnimator

We'll attach this to existing ValueAnimators that are at risk of running
during screen off - it will allow us to track down the leaky ones and
prioritize fixes.

Bug: 420685896
Test: ran ScreenOffAnimationGuardKtTest
Flag: com.android.systemui.screen_off_animation_guard_enabled
Change-Id: I261e319eb79e1605ebb3071695e67c6624930fbe