Merge pull request #760 from mindeng/v1.17.1-hotfixes

Don't intercept onTouch event when flutter view is not attached.

android/src/main/java/com/idlefish/flutterboost/XFlutterView.java

@@ -458,10 +458,6 @@ public class XFlutterView extends FrameLayout {
    */
   @Override
   public boolean onTouchEvent(@NonNull MotionEvent event) {
-    if (!isAttachedToFlutterEngine()) {
-      return super.onTouchEvent(event);
-    }
-
     // TODO(abarth): This version check might not be effective in some
     // versions of Android that statically compile code and will be upset
     // at the lack of |requestUnbufferedDispatch|. Instead, we should factor
@@ -768,4 +764,4 @@ public class XFlutterView extends FrameLayout {
 
 
 
-}
\ No newline at end of file
+}