EGLWindow: workaround eglQueryString behavior before Android 10 EGL_NO_DISPLAY + EGL_EXTENSIONS returns NULL before angle support introduced in Android 10. See aosp/760681 for the reference. Bug: b/255844932 Test: build and run angle trace on Android Pie Change-Id: I23a8236cbd220ce34ebbcc602d6ced351fc76619 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3988422 Reviewed-by: Cody Northrop <cnorthrop@google.com> Commit-Queue: Cody Northrop <cnorthrop@google.com>