Fix Apple GPU detection for M1 Renamed supportsIOSGPUFamily to supportsAppleGPUFamily to match official naming. Bug: angleproject:5672 Change-Id: Ic02c0f01bc30c12cef594cc2eb4f9932c22c1e33 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2739459 Reviewed-by: Le Hoang Quyen <le.hoang.q@gmail.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Jamie Madill <jmadill@chromium.org>