Don't accidentally delete renamed packages

Apps on the system image can change their package by declaring
their old one in the manifest. If a package is renamed it is
internally referred by its old name.

The reconciliation code was using the new package name for
renamed packages and was concluding the apk is orphaned thus
deleting it. This puts the package in a bad state where the app
is gone and the version on the system partition is disabled.

Also Play was showing an update for a renamed system app as
an install while it is an update because of the same reason,
it was using the new package name while the app is internally
referred by the old one.

The fix for both above is to internally normalize the package
name by using the old one if the package was renamed or the
package name as is.

Test: With the fix put the old calculator on the system image
and booted, then put the renamed calculator and booted, updated
calculator from play and rebooted - calculator keeps working.
Also did the above steps without the patch to put calculator
in a bad state and flashed the system with the patch which
fixed the broken calculator app.

bug:32321269

Change-Id: I98bfc05c399edfc9854ebcce44182fefa55ceeff
(cherry picked from commit e2c85890)