Show system event chip on connected displays

Creates a "Multi display" implementation of
SystemEventChipAnimationController that delegates calls to controllers
of each display.

When the flag is enabled, this implementation is used instead of the
standard one.

Test: MultiDisplaySystemEventChipAnimationControllerTest.kt
Test: SystemEventChipAnimationControllerStoreImplTest.kt
Bug: 362720432
Flag: com.android.systemui.status_bar_connected_displays
Change-Id: Icbe9d247a900f7d20b4ab98596afba5780f44de6