EGL: setup extension EGL_EXT_protected_content Add extension to registry Update hashes Bug: angleproject:3965 Change-Id: Ie2808b8a599ae4adbf6f2f1d24db046799f594df Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2800412 Commit-Queue: Brandon Schade <b.schade@samsung.com> Commit-Queue: Mohan Maiya <m.maiya@samsung.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>