Push full screen clears up to OpList

Change-Id: Icfc09b3b25f4d3834bee93286e2b24a559f44ed8
Reviewed-on: https://skia-review.googlesource.com/40120
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
5 files changed