[pm] add deDataInode in PackageUserState

It's possible that an app doesn't have a CE node on a user if the user
is locked or the CE storage for the user hasn't been prepared yet. In
those situations, there's only the DE node. We should use both the CE
node and the DE node to determine if the data dir exists.

This CL doesn't change any existing API behavior.

BUG: 288142708
Test: manual

Change-Id: I6cc0673d675c2ca9e51ddf7d9217c3c9f2b7e2cd