Unavailable DataLoader status.

This is a temporary failure, does not fail the session, but requires
caller to re-commit. E.g. there are connectivity issues which can be
fixed later.

Bug: b/153874006
Test: atest PackageManagerShellCommandTest PackageManagerShellCommandIncrementalTest IncrementalServiceTest
Change-Id: I02791a2963130dbecb510c4a7cafcf04f6245761
4 files changed