Remove a minimum wake-up time for a job

BUG: 16407786
The alarm manager doesn't impose restrictions about how soon an alarm
is allowed to be set in the future, so neither will the JS.
This behaviour should be the default, but filing under above bug
b/c this needs to happen to make CTS easier to write.

Change-Id: I55b53de5faac84f01e2ac3ce5458bfa19d73df68