Fix StatsCompanionService sometimes can be null

Bug: 75970648
Test: will add cts test for puller alarms
Change-Id: I51b7d13f855d3c8ded8325d7cf0f614531eceea5
diff --git a/cmds/statsd/Android.mk b/cmds/statsd/Android.mk
index ca0611b..642567b 100644
--- a/cmds/statsd/Android.mk
+++ b/cmds/statsd/Android.mk
@@ -62,6 +62,7 @@
     src/storage/StorageManager.cpp \
     src/StatsLogProcessor.cpp \
     src/StatsService.cpp \
+    src/statscompanion_util.cpp \
     src/subscriber/IncidentdReporter.cpp \
     src/subscriber/SubscriberReporter.cpp \
     src/HashableDimensionKey.cpp \