docs: fixed button value in reference

Test: make ds-docs

Bug: 36946449

Change-Id: I13d863e2cb0e94e51c3a274c8d27d58f7a7a78eb
Exempt-From-Owner-Approval: Docs-only change
diff --git a/core/java/android/app/AlertDialog.java b/core/java/android/app/AlertDialog.java
index 07b4b9c..39361d7 100644
--- a/core/java/android/app/AlertDialog.java
+++ b/core/java/android/app/AlertDialog.java
@@ -395,7 +395,7 @@
      * @param listener The {@link DialogInterface.OnClickListener} to use.
      * @deprecated Use
      *             {@link #setButton(int, CharSequence, android.content.DialogInterface.OnClickListener)}
-     *             with {@link DialogInterface#BUTTON_POSITIVE}
+     *             with {@link DialogInterface#BUTTON_NEUTRAL}
      */
     @Deprecated
     public void setButton3(CharSequence text, final OnClickListener listener) {