update foursquareapp.java and foursquaredialog.java

In foursquareapp, updated getNearby to use client_id and client_secret
instead of &oauth. Also update the parser, venue search returned a
different JSON file than what was programmed for. Lastly, changed the
.getString() to .optString() to account for certain values not being
there.

In foursquaredialog, updated some of the deprecated values involving
LayoutParams and Display. Update APK to be able to include these.