Handle addition of system apps during OTA

If there were apps already installed that were added in a later system
OTA, bad things would happen.

If the previously installed application is an older version, simply
delete the installed application. If the system app is older than the
previously installed one, mark it as a disabled system app and use the
previoulsy installed application.

Additionally, the application will now have the correct granted
permissions.

Bug: 6251602
Change-Id: Iea444b6acac460fca1e08d4e2cbf68a258214ca6