Handle all 4 rotations and non-full-screen viewports & scissors. Test: Running NBA 2K20 while flipping phone left and right (90 & 270) + watching it in Visual Studio and with Android logcat INFO messages Bug: b/150329969 Bug: angleproject:4431 Change-Id: Icd555dbc2419aac1413452c1b306d6227784dc27 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2174961 Commit-Queue: Ian Elliott <ianelliott@google.com> Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com> Reviewed-by: Cody Northrop <cnorthrop@google.com>
