Don't show a pattern-specific prompt at encryption time.

Bug: 18054895
Change-Id: I8a029142085b9e7f59efc8e313b6438734d5a1bb
diff --git a/src/com/android/settings/MasterClear.java b/src/com/android/settings/MasterClear.java
index a2ca554..1c9fe5c 100644
--- a/src/com/android/settings/MasterClear.java
+++ b/src/com/android/settings/MasterClear.java
@@ -72,8 +72,7 @@
     private boolean runKeyguardConfirmation(int request) {
         Resources res = getActivity().getResources();
         return new ChooseLockSettingsHelper(getActivity(), this)
-                .launchConfirmationActivity(request,
-                        res.getText(R.string.master_clear_gesture_prompt),
+                .launchConfirmationActivity(request, null,
                         res.getText(R.string.master_clear_gesture_explanation));
     }