Change favorites fragment. Create expandable list where group cursor have stops list and every group item have child route list.

See onLoaderFinished in FavoritesFragment createAdapter method call every time.
remove unneeded background, work with favorite expandlelistview to achive proper behavior
Merge branch 'favorites_expandable_list' into dev

Conflicts:
	app/src/main/java/by/euanpa/schedulegrodno/fragments/favorite/FavoritesFragment.java
fix incorrect merge