Use device names instead of address

[jackss011]

In the ConnectionDialogFragment device list Socket#getHostName() should be used instead of Socket#getHostAddress().

NOTE: Socket#getHostAddress()is a network operation, thus it shouldn't be done on the UI thread.

Two solutions:

1. Return an Object {name, address} in Beacon
2. Create an AsyncTask<Socket, Void, Name> to fetch the name

[jackss011]

Temporary fixed
Using socket host hame, but it get modified by the modem.

Possible solutions

1. PC should pass his name in the request UDP packet
2. Parse the canonical_name removing everything after the first dot

[jackss011]

Solution 2 adopted.