add result row to db table

[ShikherVerma]

on receiving gcm message of result the result should be added to table. after #34

[ShikherVerma]

after doing #34
Step 1 is to show a notification that result has being announced. and send a request to data provider to add the result string to events table.

{
"to": "/topics/foo-bar",
"data": {
"type":"result"
"event":"bla bla event"
"result":"1-contestentx,1-contestenty,2-contestentz,3-contestentd"
}
}

step 2 is to add a string column in db and add a function to add this string in data provider singleton