[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

lib/src/platforms/android/nearby_android_service.dart

@@ -69,6 +69,16 @@ class NearbyAndroidService extends NearbyService {
     return NearbyServiceAndroidPlatform.instance.disconnect();
   }
 
+  ///
+  /// On [NearbyServiceBusyException] you can check for running jobs
+  /// (if any of devices has [NearbyDeviceStatus.connecting]).
+  ///
+  /// If so, call [cancelLastConnectionProcess] to cancel last request
+  ///
+  Future<bool> cancelLastConnectionProcess() {
+    return NearbyServiceAndroidPlatform.instance.cancelConnect();
+  }
+
   ///
   /// Starts a socket service to transfer data. Uses device with
   /// [NearbyCommunicationChannelData.connectedDeviceId].

lib/src/platforms/android/nearby_service_android_interface.dart

@@ -55,6 +55,10 @@ abstract class NearbyServiceAndroidPlatform extends PlatformInterface {
     throw UnimplementedError('disconnect() has not been implemented.');
   }
 
+  Future<bool> cancelConnect() {
+    throw UnimplementedError('cancelConnect() has not been implemented.');
+  }
+
   Stream<NearbyConnectionAndroidInfo?> getConnectionInfoStream() {
     throw UnimplementedError(
       'getConnectionInfoStream() has not been implemented.',

lib/src/platforms/android/nearby_service_android_method_channel.dart

@@ -66,6 +66,12 @@ class MethodChannelAndroidNearbyService extends NearbyServiceAndroidPlatform {
     return _handleBooleanResult(result);
   }
 
+  @override
+  Future<bool> cancelConnect() async {
+    final result = await methodChannel.invokeMethod("cancelConnect");
+    return _handleBooleanResult(result);
+  }
+
   @override
   Stream<NearbyConnectionAndroidInfo?> getConnectionInfoStream() {
     const connectedDeviceChannel = EventChannel(