Set stealth mode during inflation

Test: manual
Change-Id: If321158a788ac46fc20f8bfbb67bcbfb154c6018
Fixes: 112526923
(cherry picked from commit e173274e78)

packages/SystemUI/src/com/android/keyguard/KeyguardPatternView.java

@@ -144,6 +144,8 @@ public class KeyguardPatternView extends LinearLayout implements KeyguardSecurit
         mLockPatternView = findViewById(R.id.lockPatternView);
         mLockPatternView.setSaveEnabled(false);
         mLockPatternView.setOnPatternListener(new UnlockPatternListener());
+        mLockPatternView.setInStealthMode(!mLockPatternUtils.isVisiblePatternEnabled(
+                KeyguardUpdateMonitor.getCurrentUser()));
 
         // vibrate mode will be the same for the life of this screen
         mLockPatternView.setTactileFeedbackEnabled(mLockPatternUtils.isTactileFeedbackEnabled());