The NotificationManager tries to crash the calling app, but
in the case of a service calling startForeground, the caller
is the ActivityManager, so system_server goes down.
NotificationManagerService#enqueueNotificationInternal is a
new internal-only method that accepts a UID/PID to use when
punishing bogus notifications (such as the one in
http://b/2869787).
Change-Id: I84a9854bae630bc90288cebb94f174809d5dac8c
d0a2f86f35