diff --git a/services/usage/java/com/android/server/usage/UsageStatsService.java b/services/usage/java/com/android/server/usage/UsageStatsService.java
index a98429a..ef13594 100644
--- a/services/usage/java/com/android/server/usage/UsageStatsService.java
+++ b/services/usage/java/com/android/server/usage/UsageStatsService.java
@@ -2539,10 +2539,20 @@
         }
 
         @Override
-        public void reportChooserSelection(String packageName, int userId, String contentType,
-                                           String[] annotations, String action) {
+        public void reportChooserSelection(@NonNull String packageName, int userId,
+                @NonNull String contentType, String[] annotations, @NonNull String action) {
             if (packageName == null) {
-                Slog.w(TAG, "Event report user selecting a null package");
+                throw new IllegalArgumentException("Package selection must not be null.");
+            }
+            if (contentType == null) {
+                throw new IllegalArgumentException("Content type for selection must not be null.");
+            }
+            if (action == null) {
+                throw new IllegalArgumentException("Selection action must not be null.");
+            }
+            // Verify if this package exists before reporting an event for it.
+            if (mPackageManagerInternal.getPackageUid(packageName, 0, userId) < 0) {
+                Slog.w(TAG, "Event report user selecting an invalid package");
                 return;
             }