Enforce maximum number of ads displayed across all user profiles

[tmancey]

No description provided.

[btlechowski]

Verification passed on

Brave	1.25.53 Chromium: 90.0.4430.93 (Official Build) beta (64-bit)
Revision	4df112c29cfe9a2c69b14195c0275faed4e997a7-refs/branch-heads/4430@{#1348}
OS	Ubuntu 18.04 LTS

Verified test plan from https://github.com/brave/internal/issues/759

Verified Brave Ads maximum ad notifications per day - multiple profiles - 1 per day
Verified 2nd ad was not shown in the second profile
Verified the logs

[18838:18838:0513/030533.304865:VERBOSE2:permission_rule_util.cc(23)] You have exceeded the allowed ads per day
[18838:18838:0513/030533.304961:VERBOSE1:ad_notification_serving.cc(150)] Ad notification not served: Not allowed
[18838:18838:0513/030533.305037:VERBOSE1:ad_notification_serving.cc(91)] Ad notification not delivered

Verified Brave Ads maximum new tab page ads per hour - multiple profiles - 1 per hour
First ad was shown in the first profile:

[24265:24265:0513/033529.950713:VERBOSE6:new_tab_page_ad_event_viewed.cc(32)] Successfully logged new tab page ad viewed event

Verified 2nd ad in second profile was not counted

[24265:24265:0513/033714.106877:VERBOSE2:permission_rule_util.cc(23)] You have exceeded the allowed new tab page ads per hour
[24265:24265:0513/033714.109803:VERBOSE1:new_tab_page_ad.cc(120)] New tab page ad: Not allowed

Verified Brave Ads maximum new tab page ads per day - multiple profiles - 1 per day
First ad was shown in the first profile:

[20532:20532:0513/043834.236334:VERBOSE6:new_tab_page_ad_event_viewed.cc(32)] Successfully logged new tab page ad viewed event

Verified 2nd ad in second profile was not counted

[20532:20532:0513/044038.445985:VERBOSE2:permission_rule_util.cc(23)] You have exceeded the allowed new tab page ads per day
[20532:20532:0513/044038.446068:VERBOSE1:new_tab_page_ad.cc(120)] New tab page ad: Not allowed

Promoted Content is not tested because it is not used yet and there are no promoted content ads on production, staging nor dev servers.