Remove the SurfaceVk::present() code that rotated damage rectangles
and the feature flag that controlled that rotation.

The Vulkan specification was changed so that the rectangles provided
to the VK_KHR_incremental_present extension must never be pre-rotated.
The spec change requires the same behavior on all platforms (just in
case), even though Android is the only platform known to support
rotation.

FYI: the Vulkan spec change was merge request 4442.

Bug: b/182930524
Change-Id: I5128fd76e718f3d964c9091830bcc5886d265543
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2818826
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>