Remove deprecated & removed JobInfo methods.

These methods were marked deprecated and tagged with @removed
before Pie shipped but ConnectivityController wasn't updated to perform
the proper computations. This removes the deprecated methods altogether
and updates ConnectivityController accordingly.

Bug: 135214188
Test: atest com.android.server.cts.JobSchedulerIncidentTest
Test: atest com.android.server.job.controllers.ConnectivityControllerTest
Test: atest com.android.providers.downloads.DownloadProviderFunctionalTest
Change-Id: I7c364a4326c31e8aae54a4fc69703434d8c7c915