brave_ads.enabled_last_profile is false when only profile left has ads enabled

[btlechowski]

Follow up to: #26864
This happens after deleting profile that ads were never enabled

Steps to Reproduce

1. Profile1: Enabled ads
2. Profile2: Do not able ads
3. Run Brave
4. Delete Profile2 using Profile Manager (make sure you don't activate the window of Profile1)
5. Check brave_ads.enabled_last_profile in local state

Actual result:

brave_ads.enabled_last_profile is false

Note: the state is fixed when window with Profile1 is activated

Expected result:

brave_ads.enabled_last_profile is true, because only profile left has ads enabled

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.49.91 Chromium: 110.0.5481.77 (Official Build) beta (64-bit)
Revision	65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS	Ubuntu 18.04 LTS

cc @tmancey @aseren @DJAndries

[btlechowski]

I am not able to reproduce on 1.49.93.