EGL: Stop announcing EGL_EXT_image_dma_buf_import_modifiers The extension was enabled in https://chromium-review.googlesource.com/c/angle/angle/+/2128190 without implementing the required functions, `DisplayImpl::queryDmaBufFormats` and `DisplayImpl::queryDmaBufModifiers`, resulting in crashes. Bug: angleproject:7664 Change-Id: Ifbb0a182171646df8161f6f42eafe2a476fea6b2 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3902321 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>