bare-user-only elevates runtime download size reported by flatpak info

Context

Recently we switched to repo-mode: bare-user-only in order to improve caching in our CI. Unfortunately it negatively impacted Download size reported by flatpak remote-info:

Before:

flatpak remote-info --commit=ed5da6c191adfabfc35f3bb6395ac5e8b6f995165e8527df5f405a99c915ae32 freedesktop org.freedesktop.Platform//18.08

Freedesktop Platform - Shared libraries

        ID: org.freedesktop.Platform
       Ref: runtime/org.freedesktop.Platform/x86_64/18.08
      Arch: x86_64
    Branch: 18.08
   Version: 18.08-devel
   License: GPL-2.0+
Collection: 
  Download: 292.7 MB
 Installed: 814.2 MB

    Commit: ed5da6c191adfabfc35f3bb6395ac5e8b6f995165e8527df5f405a99c915ae32
    Parent: 35fc92f60f99456182b9725a5f9d7a7fcc6728196c86c45c3660b81b93f303c4
   Subject: Export org.freedesktop.Platform
      Date: 2019-05-23 19:00:32 +0000

After:

flatpak remote-info --commit=2e5cb95deff0a86ab961ac02b5cb6e2110019eb1956ae6c9fb5c78c83ea72ef7 freedesktop org.freedesktop.Platform//18.08

Freedesktop Platform - Shared libraries

        ID: org.freedesktop.Platform
       Ref: runtime/org.freedesktop.Platform/x86_64/18.08
      Arch: x86_64
    Branch: 18.08
   Version: 18.08-devel
   License: GPL-2.0+
Collection: 
  Download: 810.8 MB
 Installed: 814.2 MB

    Commit: 2e5cb95deff0a86ab961ac02b5cb6e2110019eb1956ae6c9fb5c78c83ea72ef7
    Parent: ed5da6c191adfabfc35f3bb6395ac5e8b6f995165e8527df5f405a99c915ae32
   Subject: Export org.freedesktop.Platform
      Date: 2019-05-24 17:13:48 +0000

Description

Verify if values reported are true. If that's the case revert 6b3f866a and 0eb86183 commits.

Acceptance Criteria

We don't regress in runtime download sizes.