Transition Brave Ads StringPref/JSON to GetListPref and GetDictPref

[tmancey]

No description provided.

[btlechowski]

Verification passed on

Brave	1.44.97 Chromium: 106.0.5249.55 (Official Build) (64-bit)
Revision	4d5f098fca6ab7f4b6b7c240be3d9593c2357709-refs/branch-heads/5249@{#531}
OS	Ubuntu 18.04 LTS

Verified Epsilon greedy bandit feature is enabled

[16126:16126:0927/180151.317959:VERBOSE1:features_util.cc(37)] Text classification feature is disabled
[16126:16126:0927/180151.318178:VERBOSE1:features_util.cc(40)] Epsilon greedy bandit feature is enabled

Verified ad was shown using epsilon greedy bandit

[17337:17337:0927/181357.760330:VERBOSE2:epsilon_greedy_bandit_model.cc(162)] Exploiting epsilon greedy bandit segments:
[17337:17337:0927/181357.760561:VERBOSE1:eligible_notification_ads_v1.cc(38)] Get eligible notification ads:
[17337:17337:0927/181357.764543:VERBOSE1:eligible_notification_ads_v1.cc(161)] Get eligible ads for untargeted segment
[17337:17337:0927/181357.786579:VERBOSE2:priority.h(34)] 11 ads with a priority of 1 in bucket 1
[17337:17337:0927/181357.786774:VERBOSE1:eligible_notification_ads_v1.cc(184)] 11 eligible ads out of 11 ads for untargeted segment
[17337:17337:0927/181357.787138:VERBOSE1:notification_ad.cc(132)] Opportunity arose to serve a notification ad
[17337:17337:0927/181357.787561:VERBOSE1:notification_ad_serving.cc(140)] Found 11 eligible ads
[17337:17337:0927/181357.787712:VERBOSE1:notification_ad_serving.cc(246)] Served notification ad:
  placementId: 7572446e-543d-42ae-8d03-d1de1e5dade8
  creativeInstanceId: 2db34507-c654-4302-92ee-7fba4a8bc1fe
  creativeSetId: 45ea5952-37ca-41f0-88c2-4b546b0e6f4b
  campaignId: 1c1ac828-db13-49bb-9128-090132044b7f
  advertiserId: ecbcc833-8b1d-4867-98f7-ad2341396ce8
  segment: untargeted
  title: Ad9
  body: Ad9
  targetUrl: https://brave.com/

Verified epsilon_greedy_bandit_arms are extracted