When dragging text, take style data too.

Test: manual; dragged some formatted text. Style preserved.

Bug: 34264469
Change-Id: I8463782eba6d32dca054b8f59033745b9c5519a7
diff --git a/core/java/android/widget/Editor.java b/core/java/android/widget/Editor.java
index 2703d6e..2fc8ec9 100644
--- a/core/java/android/widget/Editor.java
+++ b/core/java/android/widget/Editor.java
@@ -2480,7 +2480,7 @@
     }
 
     void onDrop(DragEvent event) {
-        StringBuilder content = new StringBuilder("");
+        SpannableStringBuilder content = new SpannableStringBuilder();
 
         final DragAndDropPermissions permissions = DragAndDropPermissions.obtain(event);
         if (permissions != null) {