Add support for @pending annotation.

This behaves the same as @hide, but can be used to annotate API that are
only hidden pending API approval.

Change-Id: I4c0bf46c6d74ed45a8890ecdfd9b14ce234a5c18

tools/droiddoc/src/DroidDoc.java

@@ -979,10 +979,11 @@ public class DroidDoc
     }
 
     /**
-     * Returns true if the given element has an @hide annotation.
+     * Returns true if the given element has an @hide or @pending annotation.
      */
     private static boolean hasHideAnnotation(Doc doc) {
-        return doc.getRawCommentText().indexOf("@hide") != -1;
+        String comment = doc.getRawCommentText();
+        return comment.indexOf("@hide") != -1 || comment.indexOf("@pending") != -1;
     }
 
     /**