SurfaceFlinger: generate invalidate after setActiveConfig

ag/7074109 removes the refresh from setActiveConfig. We need to
make sure invalidate is called after calling setActiveConfig and to check
the fence and update out internal state.

Test: scroll within calendar app and observe systraces
Bug: 123661966
Change-Id: Ib83949a1fe855f3852808da8c4f8b4fb55f05f8c