Use GestureDetector constructor that takes in Context 3.0 (#3109)

Xamarin.Forms.Platform.Android/Cells/ViewCellRenderer.cs

@@ -90,7 +90,7 @@ namespace Xamarin.Forms.Platform.Android
 						return _longPressGestureDetector;
 					}
 
-					_longPressGestureDetector = new GestureDetector(new LongPressGestureListener(TriggerLongClick));
+					_longPressGestureDetector = new GestureDetector(Context, new LongPressGestureListener(TriggerLongClick));
 					return _longPressGestureDetector;
 				}
 			}