Only enabled on macOS 10.15 and iOS 13.0 for now.

Bug: angleproject:2634
Change-Id: Ic44a245198e32f076e429312cae844c510e864d1
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2433333Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Le Hoang Quyen <le.hoang.q@gmail.com>