Call cannection to app

lib/src/incoming_call_screen.dart

@@ -25,43 +25,43 @@ class IncomingCallScreen extends StatelessWidget {
             mainAxisSize: MainAxisSize.min,
             children: <Widget>[
               Padding(
-                padding: EdgeInsets.all(36),
-                child: Text(_getCallTitle(), style: TextStyle(fontSize: 28)),
+                padding: const EdgeInsets.all(36),
+                child: Text(_getCallTitle(), style: const TextStyle(fontSize: 28)),
               ),
-              Padding(
+              const Padding(
                 padding: EdgeInsets.only(top: 36, bottom: 8),
                 child: Text("Members:", style: TextStyle(fontSize: 20)),
               ),
               Padding(
-                padding: EdgeInsets.only(bottom: 86),
+                padding: const EdgeInsets.only(bottom: 86),
                 child: Text(_callSession.opponentsIds.join(", "),
-                    style: TextStyle(fontSize: 18)),
+                    style: const TextStyle(fontSize: 18)),
               ),
               Row(
                 mainAxisSize: MainAxisSize.min,
                 children: <Widget>[
                   Padding(
-                    padding: EdgeInsets.only(right: 36),
+                    padding: const EdgeInsets.only(right: 36),
                     child: FloatingActionButton(
                       heroTag: "RejectCall",
-                      child: Icon(
+                      backgroundColor: Colors.red,
+                      onPressed: () => _rejectCall(context, _callSession),
+                      child: const Icon(
                         Icons.call_end,
                         color: Colors.white,
                       ),
-                      backgroundColor: Colors.red,
-                      onPressed: () => _rejectCall(context, _callSession),
                     ),
                   ),
                   Padding(
-                    padding: EdgeInsets.only(left: 36),
+                    padding: const EdgeInsets.only(left: 36),
                     child: FloatingActionButton(
                       heroTag: "AcceptCall",
+                      backgroundColor: Colors.green,
+                      onPressed: () => _acceptCall(context, _callSession),
                       child: Icon(
                         Icons.call,
                         color: Colors.white,
                       ),
-                      backgroundColor: Colors.green,
-                      onPressed: () => _acceptCall(context, _callSession),
                     ),
                   ),
                 ],