Introduce shortcut container for hotseat event reporting

Bug: 170636685
Test: Manual
Change-Id: I5abeb17976bbafdc8cc74fb8b9a586d544c682fc
diff --git a/quickstep/src/com/android/launcher3/model/AppEventProducer.java b/quickstep/src/com/android/launcher3/model/AppEventProducer.java
index 364a321..58937c3 100644
--- a/quickstep/src/com/android/launcher3/model/AppEventProducer.java
+++ b/quickstep/src/com/android/launcher3/model/AppEventProducer.java
@@ -250,6 +250,9 @@
             case PREDICTION_CONTAINER: {
                 return "predictions";
             }
+            case SHORTCUTS_CONTAINER: {
+                return "shortcuts";
+            }
             case FOLDER: {
                 FolderContainer fc = ci.getFolder();
                 switch (fc.getParentContainerCase()) {