[RESTRICT AUTOMERGE] Fix stats publisher test caused by file not found

Caused by a change in StatsPublisher logic in ag/15974402

Bug: 202219412
Test: atest CarServiceUnitTest:StatsPublisherTest

Change-Id: I9ab095a3842c924959395e7cb0a392faa819ca7b
diff --git a/tests/carservice_unit_test/src/com/android/car/telemetry/publisher/StatsPublisherTest.java b/tests/carservice_unit_test/src/com/android/car/telemetry/publisher/StatsPublisherTest.java
index 2ed12bd..8173c2f 100644
--- a/tests/carservice_unit_test/src/com/android/car/telemetry/publisher/StatsPublisherTest.java
+++ b/tests/carservice_unit_test/src/com/android/car/telemetry/publisher/StatsPublisherTest.java
@@ -395,6 +395,9 @@
 
     private PersistableBundle getSavedStatsConfigs() throws Exception {
         File savedConfigsFile = new File(mRootDirectory, StatsPublisher.SAVED_STATS_CONFIGS_FILE);
+        if (!savedConfigsFile.exists()) {
+            return new PersistableBundle();
+        }
         try (FileInputStream fileInputStream = new FileInputStream(savedConfigsFile)) {
             return PersistableBundle.readFromStream(fileInputStream);
         }