Update autofill engagement metrics

[cmonfortep]

Task/Issue URL: https://app.asana.com/0/1149059203486286/1207512213117499/f and: https://app.asana.com/0/0/1207512940049066/f

Description

Updates existing enabled user metric. New metric for search dau autofill.

Steps to test this PR

Feature 1

• [x] fresh install
• [x] Don't perform any search!
• [x] in logcat use this filter package:mine message~:"m_autofill_"
• [x] got to autofill internal settings and add "few sample logins"
• [x] perform a search
• [x] ensure logs report m_autofill_toggled_on with some logins as param

Feature 2

• [x] fresh install (or clear data)
• [x] Don't perform any search!
• [x] in logcat use this filter package:mine message~:"m_autofill_"
• [x] got to autofill internal settings and add "few sample logins"
• [x] go to password settings and disable autofill
• [x] perform a search
• [x] ensure logs report m_autofill_toggled_off with some logins as param

Feature 3

• [x] fresh install (or clear data)
• [x] Don't perform any search!
• [x] in logcat use this filter package:mine message~:"m_autofill_"
• [x] got to autofill internal settings and add "lot of sample logins"
• [x] go to password settings and disable autofill
• [x] perform a search
• [x] ensure logs don't report m_autofill_enableduser

Feature 3

• [x] fresh install (or clear data)
• [x] Don't perform any search!
• [x] in logcat use this filter package:mine message~:"m_autofill_"
• [x] got to autofill internal settings and add "lot of sample logins"
• [x] go to password settings and enable autofill
• [x] perform a search
• [x] ensure logs report m_autofill_enableduser

UI changes

Before	After
!(Upload before screenshot)	(Upload after screenshot)

[cmonfortep]

• #4628 👈
• develop

This stack of pull requests is managed by Graphite. Learn more about stacking.

Join @cmonfortep and the rest of your teammates on Graphite