Merge "Keyguard should be dismissed if there is no trusted device." into qt-qpr1-dev

am: d7353d5c33

Change-Id: I37a5f7edc56db4ac33a9ad8a1ea43354c2abd655

packages/CarSystemUI/src/com/android/systemui/statusbar/car/FullscreenUserSwitcher.java

@@ -45,8 +45,6 @@ import com.android.systemui.statusbar.car.UserGridRecyclerView.UserRecord;
  */
 public class FullscreenUserSwitcher {
     private static final String TAG = FullscreenUserSwitcher.class.getSimpleName();
-    // Because user 0 is headless, user count for single user is 2
-    private static final int NUMBER_OF_BACKGROUND_USERS = 1;
     private final UserGridRecyclerView mUserGridView;
     private final View mParent;
     private final int mShortAnimDuration;
@@ -118,26 +116,17 @@ public class FullscreenUserSwitcher {
                 /* isStartGuestSession= */ false,
                 /* isAddUser= */ false,
                 /* isForeground= */ true);
-        // For single user without trusted device, hide the user switcher.
-        if (!hasMultipleUsers() && !hasTrustedDevice(initialUser)) {
-            dismissUserSwitcher();
-            return;
-        }
-        // Show unlock dialog for initial user
+
+        // If the initial user has trusted device, display the unlock dialog on the keyguard.
         if (hasTrustedDevice(initialUser)) {
             mUnlockDialogHelper.showUnlockDialogAfterDelay(initialUser,
                     mOnHideListener);
+        } else {
+            // If no trusted device, dismiss the keyguard.
+            dismissUserSwitcher();
         }
     }
 
-    /**
-     * Check if there is only one possible user to login in.
-     * In a Multi-User system there is always one background user (user 0)
-     */
-    private boolean hasMultipleUsers() {
-        return mUserManager.getUserCount() > NUMBER_OF_BACKGROUND_USERS + 1;
-    }
-
     /**
      * Makes user grid visible.
      */