Moving model data structures to a separate file

Change-Id: I77ad7a5219e72d2e0d6c1803de2ac3ed6a65a8f7
diff --git a/src/com/android/launcher3/util/PackageUserKey.java b/src/com/android/launcher3/util/PackageUserKey.java
index f243ca6..46e7070 100644
--- a/src/com/android/launcher3/util/PackageUserKey.java
+++ b/src/com/android/launcher3/util/PackageUserKey.java
@@ -5,7 +5,7 @@
 
 import androidx.annotation.Nullable;
 
-import com.android.launcher3.ItemInfo;
+import com.android.launcher3.model.data.ItemInfo;
 
 import java.util.Arrays;