Merge "Fix NPE of NativeTombstoneManager.TombstoneWatcher" into main

services/core/java/com/android/server/os/NativeTombstoneManager.java

@@ -567,6 +567,10 @@ public final class NativeTombstoneManager {
 
         @Override
         public void onEvent(int event, @Nullable String path) {
+            if (path == null) {
+                Slog.w(TAG, "path is null at TombstoneWatcher.onEvent()");
+                return;
+            }
             mHandler.post(() -> {
                 // Ignore .tmp files.
                 if (path.endsWith(".tmp")) {