Create dreams v2 aconfig flag

This can be used to guard the new dreams changes in PowerManagerService,
SystemUI, and Settings

Bug: 375689917
Test: NA
Flag: android.service.dreams.dreams_v2
Change-Id: Ifc0c60ef7de36b07453b351dc01473bfe04e388d

parent 876f1670

core/java/android/service/dreams/flags.aconfig

+8 −0

Original line number	Diff line number	Diff line
		@@ -84,3 +84,11 @@ flag {
		description: "Allow dreaming when device is stationary and upright"
		bug: "383208131"
		}

		flag {
		name: "dreams_v2"
		namespace: "systemui"
		description: "Enables various improvements to the dream experience "
		"such as new triggers and various bug fixes"
		bug: "375689917"
		}