Move the user account querying logic to UserInfoController.

Bug: 28383751
Change-Id: I85985d772b6aa9bfeb4e900854c9150481bddf7a
(cherry picked from commit ad4889c3c70ed042c24eac80f0f304ba67962dc3)
diff --git a/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java b/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java
index 5b4279c..cc875ac 100644
--- a/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java
+++ b/packages/SystemUI/src/com/android/systemui/qs/tiles/UserTile.java
@@ -96,7 +96,7 @@
     }
 
     @Override
-    public void onUserInfoChanged(String name, Drawable picture) {
+    public void onUserInfoChanged(String name, Drawable picture, String userAccount) {
         mLastUpdate = new Pair<>(name, picture);
         refreshState(mLastUpdate);
     }