am f4efa044: Update hello-gl2 sample to properly implement EGL Config selection.

Merge commit 'f4efa044a061bf159cd6d7b634371b0cde8cb0b7' into eclair-plus-aosp

* commit 'f4efa044a061bf159cd6d7b634371b0cde8cb0b7':
  Update hello-gl2 sample to properly implement EGL Config selection.