Fix bug 5067075 - missing scrollbar when entering long signatures

Let DialogPreferences decide their own IME adjust mode as normal
rather than forcing adjustPan.

Change-Id: Ib53e9f648342430640469a0682308b056e7ef991
diff --git a/core/java/android/preference/DialogPreference.java b/core/java/android/preference/DialogPreference.java
index 73427d2..c59ed18 100644
--- a/core/java/android/preference/DialogPreference.java
+++ b/core/java/android/preference/DialogPreference.java
@@ -321,8 +321,7 @@
      */
     private void requestInputMethod(Dialog dialog) {
         Window window = dialog.getWindow();
-        window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE |
-                WindowManager.LayoutParams.SOFT_INPUT_ADJUST_PAN);
+        window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
     }
 
     /**