Exposing method to register content providers in sandbox context

Bug: 263286512
Test: presubmit
Change-Id: I04a8160afec2ea0d153eca113537a8778d8f3514
diff --git a/tests/src/com/android/launcher3/util/LauncherModelHelper.java b/tests/src/com/android/launcher3/util/LauncherModelHelper.java
index caec301..fa4c519 100644
--- a/tests/src/com/android/launcher3/util/LauncherModelHelper.java
+++ b/tests/src/com/android/launcher3/util/LauncherModelHelper.java
@@ -134,7 +134,7 @@
         setupProvider(LauncherProvider.AUTHORITY, provider);
     }
 
-    protected void setupProvider(String authority, ContentProvider provider) {
+    public void setupProvider(String authority, ContentProvider provider) {
         ProviderInfo providerInfo = new ProviderInfo();
         providerInfo.authority = authority;
         providerInfo.applicationInfo = sandboxContext.getApplicationInfo();