egl: only return nonzero EGLConfig values am: c3b9921d3e am: 753e9605b8 am: 0e793a46eb

Original change: https://googleplex-android-review.googlesource.com/c/device/generic/goldfish-opengl/+/11484254

Change-Id: Ief2bb89ffa345b70c867a9643187c35cbf08bb0d