Add IconOverlay's to appropriate build/ also move experimental overlays

Test: adb shell cmd overlay enable --user 0 com.android.theme.icon.square
Bug: 118757933
Bug: 118757664

TL;DR;;

RRO apk and it's corresponding actors (applications that enable/disable the overlay)
Actors
[AOSP] packages/apps/ThemePicker is actor for IconShape*Overlay and AccentColor*Overlay
[AOSP] packages/apps/Settings is actor for DisplayCutout*Overlay

RRO packages
[AOSP] frameworks/base/packages/overlays/DisplayCutout*Overlay
[AOSP] frameworks/base/packages/overlays/IconShape*Overlay
[AOSP] frameworks/base/packages/overlays/AccentColor*Overlay


Change-Id: Ibaf5f005d112ad2ee8fc086bd7616b86446794a0