Not asserting when upgrading previews

When adding an update package to an UpdatablePkgInfo we weren't
checking for the case where the local package is a preview and the
remote isn't. Switched to simply using the base install ids, since
the extra checks were unnecessary (it would never be the case that
we'd have clashing base install ids for non-matching packages).
Fixes https://code.google.com/p/android/issues/detail?id=183068

Change-Id: I2a167727d0b74159476c4a48af076b2ea0d83103
(cherry picked from commit e0ceedf863ffb17d7cadf1b5eb8515dd182ee34b)
1 file changed