LocDemo and OWMiniAtAndroid: Reformat layouts.

This mainly properly indents the code, making it easier to understand the layout.
OWMiniAtAndroid: Move the menu to res/menu/main_menu.xml from the code.

This makes (most of) the menu literally defined instead of being in the code, and generates an ID for each element. Also, change from using onPrepareOptionsMenu() to onCreateOptionsMenu().
OWMiniAtAndroid: Format AndroidManifest.xml
OWMiniAtAndroid: Limit access for some classes and methods, add an @Override tag for consistency, setTitle() probably doesn't need to be called, remove unnecessary try-catch block.
OWMiniAtAndroid: Move adding of elements to main.xml