Fix the crash caused by missing argument keys
Fix the crash caused by missing argument keys

Test Plan:
1. Send a broadcast in app -> broadcast
2. It doesn't crash with below error any more:
TypeError: send_broadcast() takes exactly 3 arguments (5 given)

University-of-Strathclyde-LTE-Team/airnotifier,batulu12/airnotifier,University-of-Strathclyde-LTE-Team/airnotifier,imolainformatica/airnotifier,pathikb/airnotifier,nickw444/airnotifier,nickw444/airnotifier,imolainformatica/airnotifier,pathikb/airnotifier,batulu12/airnotifier,imolainformatica/airnotifier