Rewrite the clip modifier again.

There seems to be a bug regarding recording graphic layers and
AnimatedContent. b/384693912.

Avoid that by using regular offscreen clipping, but optimize a bit for
not clipping when the rect to clip is empty.

Test: manual, clip and edit mode
Fixes: 384520541
Bug: 384693912
Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Change-Id: I1901e53057984a1138fe70477a19d8a300ca9f16