Follow up to #17670: Blocking parent-child segment will also block parent segment

[btlechowski]

Follow up to #17670. The issue is still reproducible

So for technology & computing-software, parent segment technology & computing is blocked and parent-child segment technology & computing-software is blocked. Thus user will not get ads from technology & computing-software and technology & computing

Steps to Reproduce

1. Follow steps Blocked notification ad - parent-child segment from https://github.com/brave/internal/issues/794

Actual result:

technology & computing is not in eligible ads for parent segments:

[13491:13491:0824/234328.344100:VERBOSE1:eligible_ad_notifications.cc(87)] Get eligible ads for parent-child segments:
[13491:13491:0824/234328.344327:VERBOSE1:eligible_ad_notifications.cc(89)]   personal finance-personal finance
[13491:13491:0824/234328.344473:VERBOSE1:eligible_ad_notifications.cc(89)]   home-appliances
[13491:13491:0824/234328.344597:VERBOSE1:eligible_ad_notifications.cc(89)]   food & drink-vegetarian
[13491:13491:0824/234328.345571:VERBOSE1:eligible_ad_notifications.cc(100)] No eligible ads for parent-child segments
[13491:13491:0824/234328.345728:VERBOSE1:eligible_ad_notifications.cc(122)] Get eligible ads for parent segments:
[13491:13491:0824/234328.345891:VERBOSE1:eligible_ad_notifications.cc(124)]   personal finance
[13491:13491:0824/234328.346036:VERBOSE1:eligible_ad_notifications.cc(124)]   home
[13491:13491:0824/234328.346194:VERBOSE1:eligible_ad_notifications.cc(124)]   food & drink
[13491:13491:0824/234328.347023:VERBOSE1:eligible_ad_notifications.cc(135)] No eligible ads for parent segments
[13491:13491:0824/234328.347186:VERBOSE1:eligible_ad_notifications.cc(147)] Get eligble ads for untargeted segment
[13491:13491:0824/234328.348202:VERBOSE1:eligible_ad_notifications.cc(159)] No eligible ads for untargeted segment
[13491:13491:0824/234328.349213:VERBOSE1:ad_notification_serving.cc(121)] Ad notification not served: No eligible ads found

Expected result:

technology & computing is in eligible ads for parent segments:

[13491:13491:0824/234328.344100:VERBOSE1:eligible_ad_notifications.cc(87)] Get eligible ads for parent-child segments:
[13491:13491:0824/234328.344327:VERBOSE1:eligible_ad_notifications.cc(89)]   personal finance-personal finance
[13491:13491:0824/234328.344473:VERBOSE1:eligible_ad_notifications.cc(89)]   home-appliances
[13491:13491:0824/234328.344597:VERBOSE1:eligible_ad_notifications.cc(89)]   food & drink-vegetarian
[13491:13491:0824/234328.345571:VERBOSE1:eligible_ad_notifications.cc(100)] No eligible ads for parent-child segments
[13491:13491:0824/234328.345728:VERBOSE1:eligible_ad_notifications.cc(122)] Get eligible ads for parent segments:
[13491:13491:0824/234328.345891:VERBOSE1:eligible_ad_notifications.cc(124)]   technology & computing
[13491:13491:0824/234328.346036:VERBOSE1:eligible_ad_notifications.cc(124)]   personal finance
[13491:13491:0824/234328.346194:VERBOSE1:eligible_ad_notifications.cc(124)]   home
[13491:13491:0824/234328.347023:VERBOSE1:eligible_ad_notifications.cc(135)] No eligible ads for parent segments
[13491:13491:0824/234328.347186:VERBOSE1:eligible_ad_notifications.cc(147)] Get eligble ads for untargeted segment
[13491:13491:0824/234328.348202:VERBOSE1:eligible_ad_notifications.cc(159)] No eligible ads for untargeted segment

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.31.2 Chromium: 93.0.4577.58 (Official Build) nightly (64-bit)
Revision	c4410ece044414ea42fa4ba328d08195e818a99c-refs/branch-heads/4577@{#1076}
OS	Linux

cc @tmancey @moritzhaller @jsecretan @rebron @brave/legacy_qa

[btlechowski]

Verification passed on

Brave	1.30.65 Chromium: 93.0.4577.63 (Official Build) beta (64-bit)
Revision	ff5c0da2ec0adeaed5550e6c7e98417dac77d98a-refs/branch-heads/4577@{#1135}
OS	Ubuntu 18.04 LTS

Verified test plan from the description
Verified technology & computing-software ad was shown and successfully blocked in ads history

Verified technology & computing ad was shown