android-permissions package should update home dirs for app users

[eighthave]

The Debian android-permissions package sets up the user accounts for each app. It should also include script that runs at startup that updates each app user's home dir with the base path to the app itself. For example, if u0_a43 is Lil' Debi's app uid, then the home dir should be /data/data/info.guardianproject.lildebi.