ShortcutManager: Break down unit tests

The test file is getting too big and making the IDE very slow.
Now it's split into multiple files

Change-Id: I50ed89f19defd3809f327bc21e7d9ea790dcde4e
diff --git a/services/tests/shortcutmanagerutils/src/com/android/server/pm/shortcutmanagertest/ShortcutManagerTestUtils.java b/services/tests/shortcutmanagerutils/src/com/android/server/pm/shortcutmanagertest/ShortcutManagerTestUtils.java
index c91505e..71878fd 100644
--- a/services/tests/shortcutmanagerutils/src/com/android/server/pm/shortcutmanagertest/ShortcutManagerTestUtils.java
+++ b/services/tests/shortcutmanagerutils/src/com/android/server/pm/shortcutmanagertest/ShortcutManagerTestUtils.java
@@ -65,6 +65,10 @@
 import java.util.function.Function;
 import java.util.function.Predicate;
 
+/**
+ * Common utility methods for ShortcutManager tests.  This is used by both CTS and the unit tests.
+ * Because it's used by CTS too, it can only access the public APIs.
+ */
 public class ShortcutManagerTestUtils {
     private static final String TAG = "ShortcutManagerUtils";