Priority can be assigned to jobs. Higher priority
jobs can preempt lower priority ones. Reason for
calling onStopJob (timeout, preempt, etc.) is set
on the JobParameters object.
Reference:
https://docs.google.com/document/d/1fuVO5rBCkODx8wjk6uulFCP1Uzfx7IVsw2EyKKrGqVA
Change-Id: Ic36016514cec076984d44086316d8d00d896b3aa