If project/jni/application/src/ouya_icon.png exists, use it instead of a duplicate
of project/jni/application/src/icon.png

When the ouya_icon.png file is not present in src, fall back to the old behavior.
remove project/res/drawable/ouya_icon.png from git and add it to .gitignore
because the symlink is created dynamically by changeAppSettings.sh now