When an app without INSTALL permission attempts to commit a session,
we involve user to confirm permissions. We currently point at the
base APK, which defines all permissions for an app, handling the case
where a session may only be adding splits.
Add failure codes to represent rejection. Fix bug by ignoring stages
during initial boot scan.
Bug: 16515814
Change-Id: I702bb72445216817bcc62b79c83980c1c2bb0120