Get wrong colorBlit results on android if there is
flip operation added by glBlitFramebuffer API.
Fix the implementation and add related end2end tests.

Bug: angleproject:5044
Change-Id: I797f8858b3943b5effe27261e954ca1405960ef0
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2534210
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Ian Elliott <ianelliott@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>