Fix compilation issue caused by new lint rules in SDK Tools 21.1
Fix compilation issue caused by new lint rules in SDK Tools 21.1

Yes, invalidateOptionsMenu() was added to Activity class in API
11, but MainActivity is a SherlockFragmentActivity, which implements
a compat version of the function.

Signed-off-by: Greg Meiste <8a8f45e57c045ec63dc7e56e5eda862ea8c7cd4f@gmail.com>

meisteg/PickTheWinner,meisteg/PickTheWinner,meisteg/PickTheWinner