[ENR] Skip hide sensitive notification anim

This CL skips hide sensitive notification animation when showing layout is the same. Current implementation reveals one of them first and transitions to the other.
It causes sub-optimal experience in animations and notification content.

Flag: com.android.systemui.skip_hide_sensitive_notif_animation
Bug: 390624334
Test: Presubmit &&  Before/After video comes after
Change-Id: I02552a9eceada6e5e9e0653dea326d4985aa4bbf