Implement pixels for feature discoverability

[LukasPaczos]

Task/Issue URL: https://app.asana.com/0/0/1209376654707617

Description

Implements the required pixels (see the task).

I suggest reviewing commit by commit. If that's still problematic, let me know, I'm happy to separate the changes into independent PRs.

Steps to test this PR

• Passwords & Autofill
  • Open the setting screen.
  • Verify that m_autofill_management_opened pixel is sent with has_credentials_saved=0 parameter.
  • Save a password and reopen the setting screen.
  • Verify that m_autofill_management_opened pixel is sent with has_credentials_saved=1 parameter.
• Sync
  • Open the setting screen.
  • Verify that ms_sync_pressed pixel is sent with is_enabled=0 parameter.
  • Enable sync and reopen the setting screen.
  • Verify that ms_sync_pressed pixel is sent with is_enabled=1 parameter.
• Duck Chat
  • Open Duck Chat settings screen.
  • Verify that settings_aichat_pressed pixel is sent with was_used_before=0 parameter.
  • Open Duck Chat from browser overflow menu.
  • Verify that aichat_open_browser_menu pixel is sent with was_used_before=0 parameter.
  • Open Duck Chat from new tab overflow menu.
  • Verify that aichat_open_new_tab_menu pixel is sent with was_used_before=1 parameter.
  • Open Duck Chat settings screen.
  • Verify that settings_aichat_pressed pixel is sent with was_used_before=1 parameter.
• Duck Player
  • Open Duck Player setting screen.
  • Verify that duckplayer_setting_pressed pixel is sent with was_used_before=0 parameter.
  • Open a video with Duck Player.
  • Open Duck Player setting screen.
  • Verify that duckplayer_setting_pressed pixel is sent with was_used_before=1 parameter.
• Email protection
  • Open email protection setting screen.
  • Verify that ms_email_protection_setting_pressed pixel is sent with is_signed_in=0 parameter.
  • Sign in with an email and reopen the setting screen.
  • Verify that ms_email_protection_setting_pressed pixel is sent with is_signed_in=1 parameter.
• Privacy Pro
  • Click on "Get Privacy Pro".
  • Verify that m_privacy-pro_app-settings_get_click pixel is sent.
• VPN
  • Activate a test subscription (or make PPro screens available via other means) and open VPN settings screen.
  • Verify that m_netp_ev_setting_pressed_c pixel is sent with was_used_before=0 parameter.
  • Enable VPN and reopen the VPN settings page.
  • Verify that m_netp_ev_setting_pressed_c pixel is sent with was_used_before=1 parameter.
  • Disable VPN and reopen the VPN settings page.
  • Verify that m_netp_ev_setting_pressed_c pixel is sent with was_used_before=1 parameter.

[anikiki]

Looks good and works as expected! 🎉