Update activity_main_activity2.xml
removing onclicklistener

still retained in commnet form
Create UDPListenerService.java
packets not received fixed

acquired multicast lock before receive
receiving packets now

added getBroadcastAddress()
changes corresponding to UDPListener

permissions for change in multicast state, wifi state and wifi access added
Merge pull request #1 from PrathamR/master

change in onClick