Added a Chat window for debug/testing purposes

added the original Bluetooth Chat app window into SettingsActivity for
debug and testing purposes.

As of now application does not crash and functions properly, but I
don't have another Android BT device available to test
full-functionality of sending and receiving messages. Will have to wait
& see once I can use the Radar Kit. *May need a few tweaks once another
device is connected to the tablet.