ChooseLockPattern: remove redundant setting of visible pattern default

Remove the code that set LOCK_PATTERN_VISIBLE to true the first time a
pattern was set, since LOCK_PATTERN_VISIBLE now defaults to true when
unset (ag/22912136).  The explicit defaulting to true was only needed
before because the low-level default value was wrong.

Bug: 270013005
Test: Set a pattern.  Verified that Keyguard uses visible pattern.
      Disabled the "Make pattern visible" option in Settings.  Verified
      that Keyguard doesn't use visible pattern.
Change-Id: I63f29c68f9a508fee0ee2f03f2cca33317fb8a32

src/com/android/settings/password/ChooseLockPattern.java

@@ -873,7 +873,6 @@ public class ChooseLockPattern extends SettingsActivity {
 
         private LockscreenCredential mChosenPattern;
         private LockscreenCredential mCurrentCredential;
-        private boolean mLockVirgin;
 
         public void start(LockPatternUtils utils, boolean requestGatekeeperPassword,
                 LockscreenCredential chosenPattern, LockscreenCredential currentCredential,
@@ -885,8 +884,6 @@ public class ChooseLockPattern extends SettingsActivity {
             mChosenPattern = chosenPattern;
             mUserId = userId;
 
-            mLockVirgin = !mUtils.isPatternEverChosen(mUserId);
-
             start();
         }
 
@@ -917,14 +914,5 @@ public class ChooseLockPattern extends SettingsActivity {
             }
             return Pair.create(success, result);
         }
-
-        @Override
-        protected void finish(Intent resultData) {
-            if (mLockVirgin) {
-                mUtils.setVisiblePatternEnabled(true, mUserId);
-            }
-
-            super.finish(resultData);
-        }
     }
 }