Removed Calls to deprecated APIs

Change-Id: I3f9b6a8d3c8a050156a6cc7ea0eb9de33b82f79a
diff --git a/core/java/android/preference/DialogPreference.java b/core/java/android/preference/DialogPreference.java
index cc48aeb..bbad2b6 100644
--- a/core/java/android/preference/DialogPreference.java
+++ b/core/java/android/preference/DialogPreference.java
@@ -33,7 +33,6 @@
 import android.view.View;
 import android.view.Window;
 import android.view.WindowManager;
-import android.view.inputmethod.InputMethodManager;
 import android.widget.TextView;
 
 /**
@@ -275,7 +274,7 @@
     protected void showDialog(Bundle state) {
         Context context = getContext();
 
-        mWhichButtonClicked = DialogInterface.BUTTON2;
+        mWhichButtonClicked = DialogInterface.BUTTON_NEGATIVE;
         
         mBuilder = new AlertDialog.Builder(context)
             .setTitle(mDialogTitle)