Add pixels to measure baseline for New Tab Page sections

[dus7]

Task/Issue URL: https://app.asana.com/0/72649045549333/1207636557063695/f Tech Design URL: CC:

Description:

Adds pixels allowing to have a baseline measurement of usage for existing implementation of Home Page (a.k.a. New Tab Page).

Steps to test this PR:

1. Make sure New Tab Page Sections flag is disabled in Debug menu.
2. Check daily pixels are firing on proper triggers defined in task, all without ATB parameter:
   1. Opening new tab page, with favorites count range in parameter
   2. Adding a favorite from browsing menu
   3. Adding a bookmark
   4. Opening favorite from NTP
   5. Opening a bookmark from list

Definition of Done (Internal Only):

• [ ] Does this PR satisfy our Definition of Done?

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Internal references:

Software Engineering Expectations Technical Design Template