Revert "LockscreenNotification: fix NullPointerException when i reboot"

This reverts commit a715313ddec9738a5d46fe1aecb5d295317f526c.
Revert "frameworks: Lockscreen Notifications (1/2)"

This reverts commit 2718faf8307cb19c7f7d93d4a6a6b47622cd21c3.