Allow overriding enterprise related strings in Launcher

Test: manual
Bug: 188414133
Bug: 211422509
Bug: 188410712
Change-Id: I75858cdcf2057e7c270da5893cd9a90c6753f182

src/com/android/launcher3/model/BgDataModel.java

@@ -113,6 +113,11 @@ public class BgDataModel {
      */
     public final WidgetsModel widgetsModel = new WidgetsModel();
 
+    /**
+     * Cache for strings used in launcher
+     */
+    public final StringCache stringCache = new StringCache();
+
     /**
      * Id when the model was last bound
      */
@@ -505,5 +510,10 @@ public class BgDataModel {
         default void bindExtraContainerItems(FixedContainerItems item) { }
 
         default void bindAllApplications(AppInfo[] apps, int flags) { }
+
+        /**
+         * Binds the cache of string resources
+         */
+        default void bindStringCache(StringCache cache) { }
     }
 }