MSAA PreRot: Make MultisampleTest use rectangular window
MSAA PreRot: Make MultisampleTest use rectangular window

This will make it easier to fix/prevent bugs with MSAA-swapchain
windows, which are not currently pre-rotated properly on Android.

Bug: b/175793022
Change-Id: Ia51446db62c8ec94313ae75fd87ad8e9477f76e2
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2656997
Commit-Queue: Ian Elliott <ac50c12f27752fd82643b0b72adab33538bb2c97@google.com>
Reviewed-by: Shahbaz Youssefi <582eeec4f08a2ccd61e3ef52115e6e7c571582de@chromium.org>

ppy/angle,ppy/angle,ppy/angle,ppy/angle