Handle compressed APK enable/disable

There are two scenarios handled with this change:

* When updates are removed for a compressed APK, we re-scan
  the stub and disable the package. The stub must never be
  enabled by its own

* When a stub is enabled programatically [eg. via settings],
  extract the compressed APK to the data partition, scan
  the extracted APKs and only then enable the application

Bug: 64386107
Test: Manual; create a test stub app and verify enable/disable work as expected from the settings UI
Test: Manual; chagne the code to trigger various failures and verify the system remains stable
Change-Id: Ia4cb8e25ce8da11edc910d531eedaa37a9093002