Fix monkey crash by guarding singleton initializing

Fixes: 35203476
Test: Run monkey test and observe no crash happens.
      adb shell monkey -p com.google.android.launcher -p com.android.settings
           -c android.intent.category.LAUNCHER --ignore-security-exceptions
	   --monitor-native-crashes -s 454 -v -v -v 125000
Change-Id: Ib13afcc4e14470510f3ccbb20d7e7d6009347149