Allow override the suppress Overlay condition

Create interface for allowing the #shouldSuppressOverlay() method could
be overrided by different implementation.

Bug: 358473717
Flag: com.android.systemui.override_suppress_overlay_condition
Test: atest ClipboardListenerTest
Change-Id: Iaa3b518820a923537968c4c67cf047bcb77b9b50
8 files changed