Android will return VK_SUBOPTIMAL_KHR if the orientation of the
screen is not optimial for the orientation of the device.
We were re-creating the swapchain when this happens but we weren't
changing the orientation and would get this return code every
time we call vkQueuePresent and re-create the swapchain each time.
Apparently recreating the swapchain causes visual artifacts on
some devices. Just ignoring VK_SUBOPTIMAL_KHR allows things to
work.
Bug: angleproject:3497

Need to implement proper preRotation support for longterm fix.
Bug: angleproject:3502

Change-Id: I0904eb60b742d24618d502c111510117758a8502
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1641206Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com>