[Android] Add cancel request method (#7)

* feat: add cancel connect for android

* fix: cancel connect only for android

* fix: clean up the project

* chore: new fvm version

* chore: code style and comments

* chore: bump version to 0.0.8

example_full/lib/domain/app_service.dart

@@ -135,6 +135,10 @@ class AppService extends ChangeNotifier {
 
   Future<void> stopDiscovery() async {
     try {
+      final hasRunning = await hasRunningJobs();
+      if (hasRunning) {
+        await cancelConnect();
+      }
       final result = await _nearbyService.stopDiscovery();
       if (result) {
         updateState(AppState.readyToDiscover);
@@ -170,6 +174,17 @@ class AppService extends ChangeNotifier {
     notifyListeners();
   }
 
+  Future<void> cancelConnect() async {
+    try {
+      await _nearbyService.android?.cancelLastConnectionProcess();
+    } on NearbyServiceBusyException catch (_) {
+      _logBusyException();
+    } catch (e, s) {
+      _log(e, s);
+    }
+    notifyListeners();
+  }
+
   Future<void> stopListeningAll() async {
     await endCommunicationChannel();
     await stopListeningConnectedDevice();