title: Launch Android app rather than system's default phone app
body: <p>I made an Android app to show an attractive GUI whenever there is a new outgoing or incoming call. Whenever a broadcast signal (either <code>NEW_OTUGOING_CALL</code> or <code>PHONE_STATE</code>) is received, my app launches, same as the Android mobile's default phone app.</p>
  <p>Sometimes my app appears on screen and sometimes the default phone app appears on screen. Only my app should be launched to handle incoming/outgoing calls or my app should be on top of default phone app.</p>