Implement additional ad event confirmations

[jsecretan]

Test plan

See brave/brave-core#1890

Description

The current implementation of ad confirmations sends those secure confirmations in the event of an ad being viewed (Confirmation type: view). However, to complete our requirements for campaign reporting, we need to implement the following additional confirmations attached to the following events:

• Confirmation upon clicking through on an ad (Confirmation type: click)
• Confirmation for when an ad is dismissed (X'ed out) (Confirmation type: dismiss)
• Following a click, a confirmation that is sent after the user has the landing page open for 10 seconds (Confirmation type: landed)

[bsclifton]

Updated milestone after brave/brave-core#1923 was merged

[GeetaSarvadnya]

Verification passed on

Brave	0.63.31 Chromium: 73.0.3683.75 (Official Build) beta (64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Windows 10 OS Build 17134.523

• Timed out ads After getting ads notification waited for around 2mins until ads notification vanishes without any user interaction. Verified the confirmations.json file after notification got vanished.

clicked, viewed, dismissed and landed Ads are redeemed on Ads Serve and timed out Ads are not redeemed on Ads Server.

• Verified the test plan from Implement additional ad event confirmations brave-core#1890
• Verified the description mentioned in the issue
• Encountered Confirmation type dismiss is not recorded in confirmations.json file #4023

Verification passed on both

Brave	0.63.40 Chromium: 74.0.3729.61 (Official Build) beta(64-bit)
Revision	5df2c8936783bd7575987e45d72a92fcf528496b-refs/branch-heads/3729@{#645}
OS	Linux

 "transactions": [
      {
        "confirmation_type": "view",
        "estimated_redemption_value": 0.05,
        "timestamp_in_seconds": "13198861161"
      },
      {
        "confirmation_type": "click",
        "estimated_redemption_value": 0.0,
        "timestamp_in_seconds": "13198861169"
      },
      {
        "confirmation_type": "landed",
        "estimated_redemption_value": 0.0,
        "timestamp_in_seconds": "13198865269"
      },
      {
        "confirmation_type": "dismiss",
        "estimated_redemption_value": 0.0,
        "timestamp_in_seconds": "13198950367"
      }
    ]
  },

Brave	0.64.47 Chromium: 74.0.3729.61 (Official Build) dev(64-bit)
Revision	5df2c8936783bd7575987e45d72a92fcf528496b-refs/branch-heads/3729@{#645}
OS	Linux

"transactions": [
      {
        "confirmation_type": "view",
        "estimated_redemption_value": 0.05,
        "timestamp_in_seconds": "13198596718"
      },
      {
        "confirmation_type": "click",
        "estimated_redemption_value": 0.0,
        "timestamp_in_seconds": "13198596731"
      },
      {
        "confirmation_type": "landed",
        "estimated_redemption_value": 0.0,
        "timestamp_in_seconds": "13198596740"
      },
      {
        "confirmation_type": "dismiss",
        "estimated_redemption_value": 0.0,
        "timestamp_in_seconds": "13199902904"
      }
    ]
  },

Verified passed with

Brave	0.63.44 Chromium: 74.0.3729.75 (Official Build) beta(64-bit)
Revision	fdb7915642fef8cf997beac2554709d148e3c187-refs/branch-heads/3729@{#754}
OS	Mac OS X