GL: Implement EGL_ANDROID_get_frame_timestamps. BUG=angleproject:2936 Change-Id: I758d797d185b2de330cce3401bfeef76c7df590e Reviewed-on: https://chromium-review.googlesource.com/c/1302836 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>