... when PackageInstaller is the installer (privext).
* In the case where the Privileged Extension is installed,
but the installation happens through DefaultInstaller still
due to something like a permission mismatch,
that is set as the installer package name.
* We cannot install packages installed by that via the system methods,
so fallback to DefualtInstaller for uninstalling as well when the
app is installed by PackageInstaller
c095a85c3d