Hide method to fix the build

Change-Id: I5a556454a722bf037932632fa7e6ee6a2832a68d

Author: Gilles Debunne

core/java/android/text/style/SuggestionSpan.java

@@ -267,6 +267,8 @@ public void updateDrawState(TextPaint tp) {
 
     /**
      * @return The color of the underline for that span, or 0 if there is no underline
+     *
+     * @hide
      */
     public int getUnderlineColor() {
         // The order here should match what is used in updateDrawState