[pm/incremental] schedule write when loading progress is complete

We don't have an automatic write back in PackageSetting today.
Manually schedule a write when the loading of a package is complete.

Register the progress listener on reboot if a package has not finished
loading before reboot. This will reset the loading progress in the
package setting.

BUG: 181351007
Test: manual and cts test (coming up soon)
Change-Id: Ifea8e1866ce2211025efc20e1da51fff8f57b2aa