Low level shutdown is triggered after SystemServer is cleaned up. sys.shutdown.requested is private to SystemServer and is used to syncrhonize the shutdown process if SystemServer crashes before hardware reboot is complete. Native daemons must use low level shutdown indication from powermanager for their graceful shutdown, if they wish to stop before init terminates the process. Change-Id: Ia583f7dce6f1927d9b766fdc132f082b409f4d67 Signed-off-by: kubersharma001 <kubersharma001@gmail.com>