ScreenDecorations Cutout Provider

Move cutout to provider.

Bug: 232874879
Test: atest ScreenDecorationsTest CutoutDecorProviderFactoryTest \
      OverlayWindowTest
Test: fold/unfold/rotate/debugRoundedCornerSize/debugFlag on sw-layer
      devices
Test: adb shell dumpsys activity service com.android.systemui
Change-Id: Iadda7085349ed02a84c5e7501034872877f460c8