Ignore null action in PackageManagerService.

Bug: 375569842
Test: Manual.
Change-Id: I85cb675a456a058a3c54689077dc21e233337d2c
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index 69c78eb..f9c1037 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -4283,6 +4283,10 @@
                 if (intent == null) {
                     return;
                 }
+                final String action = intent.getAction();
+                if (action == null) {
+                    return;
+                }
                 Uri data = intent.getData();
                 if (data == null) {
                     return;