[Flutter] Pass paymentsStream as a broadcast streams

packages/flutter/example/lib/routes/home/home_page.dart

@@ -72,13 +72,13 @@ class _HomePageState extends State<HomePage> {
                 Container(
                   height: constraints.maxHeight * 0.3,
                   color: Colors.white,
-                  child: Balance(walletInfoStream: walletInfoStream()),
+                  child: Balance(walletInfoStream: walletInfoStream().asBroadcastStream()),
                 ),
                 Container(
                   height: constraints.maxHeight * 0.7,
                   color: Colors.white,
                   child: PaymentList(
-                    paymentsStream: paymentsStream(),
+                    paymentsStream: paymentsStream().asBroadcastStream(),
                     onRefresh: () async => await _sync(),
                   ),
                 ),
@@ -91,7 +91,7 @@ class _HomePageState extends State<HomePage> {
         floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
         bottomNavigationBar: HomePageBottomAppBar(
           liquidSDK: widget.liquidSDK,
-          paymentsStream: paymentsStream(),
+          paymentsStream: paymentsStream().asBroadcastStream(),
         ),
       ),
     );

packages/flutter/example/lib/routes/home/widgets/bottom_app_bar.dart

@@ -47,8 +47,10 @@ class HomePageBottomAppBar extends StatelessWidget {
               onPressed: () {
                 showDialog(
                   context: context,
-                  builder: (context) =>
-                      ReceivePaymentDialog(liquidSDK: liquidSDK, paymentsStream: paymentsStream),
+                  builder: (context) => ReceivePaymentDialog(
+                    liquidSDK: liquidSDK,
+                    paymentsStream: paymentsStream.asBroadcastStream(),
+                  ),
                 );
               },
               child: Text(