Fix drag and drop of files in multiline textfield when a custom draggedType property is used (#1452)

In #1429 I had naively assumed that `NSPasteboardTypeFileURL` is 1:1 replacement for the deprecated `NSFilenamesPboardType` property. It is not. It causes drag and drop of files from Finder to stop working.

Author: christophpurrer

Libraries/Text/TextInput/RCTBaseTextInputView.m

@@ -681,7 +681,7 @@ - (BOOL)textInputShouldHandleKeyEvent:(NSEvent *)event {
 - (BOOL)textInputShouldHandlePaste:(__unused id)sender
 {
   NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
-  NSPasteboardType fileType = [pasteboard availableTypeFromArray:@[NSPasteboardTypeFileURL, NSPasteboardTypePNG, NSPasteboardTypeTIFF]];
+  NSPasteboardType fileType = [pasteboard availableTypeFromArray:@[NSFilenamesPboardType, NSPasteboardTypePNG, NSPasteboardTypeTIFF]];
   NSArray<NSPasteboardType>* pastedTypes = ((RCTUITextView*) self.backedTextInputView).readablePasteboardTypes;
 
   // If there's a fileType that is of interest, notify JS. Also blocks notifying JS if it's a text paste

React/Base/RCTConvert.m

@@ -1233,7 +1233,7 @@ + (NSArray *)CGColorArray:(id)json
   }
 
   if ([type isEqualToString:@"fileUrl"]) {
-    return @[NSPasteboardTypeFileURL];
+    return @[NSFilenamesPboardType];
   } else if ([type isEqualToString:@"image"]) {
     return @[NSPasteboardTypePNG, NSPasteboardTypeTIFF];
   } else if ([type isEqualToString:@"string"]) {