Include inactive tabs statistics in daily tab switcher pixel

[dus7]

Task/Issue URL: https://app.asana.com/0/72649045549333/1208778471392233/f
Tech Design URL:
CC:

Description:

Adds statistics information about inactive tabs to m_tab_manager_clicked_daily pixel. Although Tab model has been changed, migration is not necessary. New property is optional and is defaulting to nil in case no value has been found.
Pixel details can be found in this task.

Steps to test this PR:

Prerequisite: Change DailyPixel.hasBeenFiredToday to return false.

1. Build and run current public version (can be any recent one) or make sure you already have a few tabs opened.
2. Build and run this code.
3. Observe pixel after opening tab switcher:
   1. There should be 0 inactive tabs reported (as they don't have last activity date stored)
   2. Go to a few of opened tabs, on next pixel fire they should be counted as inactive tabs in respective bucket (tab_active_7d).
4. Open a bunch of new tabs.
5. Observe pixel parameters include new tabs in counts after opening tab switcher.

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