FramebufferVk::clearImpl() needs to potentially rotate the results of
getCompleteRenderArea(), so that it can be compared with the results
of getScissoredRenderArea().

Bug: b/151111296
Change-Id: Iad1fbdcb1943bae00835d31863d32ee85dbc7c2d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2303606Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
Reviewed-by: Tim Van Patten <timvp@google.com>
Commit-Queue: Ian Elliott <ianelliott@google.com>