Spec language for ANGLE_external_objects_flags This extension will allow the application to specify create and usage flags used to create a Vulkan image that is being imported in GL. Bug: angleproject:4912 Bug: fuchsia:52759 Change-Id: I635e87eaf8bb0797e474dd91b11d4b3779e9a3f3 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2335018 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Michael Spang <spang@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>