Migrate user switcher to car userlib package.

Bug: 113868873
Test: build
Change-Id: I968094bba04873245a2bd17f58edaa9b251222b4
(cherry picked from commit a2530c2ab2aeb25ce741c367e2ee48703c2a0f17)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridRecyclerView.java b/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridRecyclerView.java
index 67e512c..618a4c1 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridRecyclerView.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/car/UserGridRecyclerView.java
@@ -22,7 +22,7 @@
 import android.app.AlertDialog;
 import android.app.AlertDialog.Builder;
 import android.app.Dialog;
-import android.car.user.CarUserManagerHelper;
+import android.car.userlib.CarUserManagerHelper;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.pm.UserInfo;