Add privacy notice related strings

Pop out privacy notice with onboarding

Using embeded geckoview to display details about privacy

Present or hide privacy pop window according to isMozillaOnline

Add activity_privacy_content_display.xml into layoutNotToTest due to EngineView

* For #16828 - Adds telemetry for open in app banner

Specifically: Banner displayed, Dismiss action, Go to Settings action.

When we build release APKs on Mozilla infrastructure, we want a way to
know this in code for features that would only work on them.

* For #17655: Do not pass threshold if showTopFrecentSites is false.

* For #17655: Add unit tests for getTopSitesConfig.

Update Bug report template

Let's make mozilla-releng/staging-fenix the official staging repository.
By supporting it in the automation, we no longer need to maintain a
staging patchset to test things properly.

* Sync visual-metrics script with mozilla-central.

* Use | instead of - in the error line formatting.

Co-authored-by: hakkikaancaliskan <caliskanhkaan@gmail.com>

* Tabs tray CFR telemetry interactions

* Create CFR events and implementation

* Tests for tab tray controller