Set version to 12.0.1

Merge mozilla-mobile#4430

4430: Closes mozilla-mobile#4428: Remove fingerprint from the tracking protection recommended policy. r=pocmo a=Amejia481



Co-authored-by: Arturo Mejia <[email protected]>

Merge mozilla-mobile#4358

4358: Closes mozilla-mobile#4348: Empty toolbar after switching from custom tab to browser r=pocmo a=csadilek

Pretty much exactly as described in mozilla-mobile#4348 (comment). We need to update our store to move the tab from the custom tab list to the regular tab list. I decided to re-use our existing events (Remove, Add) instead of introducing a new one, as it's technically two different reducers having to handle it.

I've verified that this fixes the issues in Fenix (and r-b).

Co-authored-by: Christian Sadilek <[email protected]>

Merge mozilla-mobile#4275

4275: Deprecate `service-telemetry` r=Dexterp37 a=Dexterp37

This adds a deprecation annotation to `Telemetry` and `TelemetryHolder` in addition to the README and changelog entries.



Co-authored-by: Alessio Placitelli <[email protected]>

Import strings from android-l10n

State: mozilla-l10n/android-l10n@349efdb

Merge mozilla-mobile#4211

4211: Closes mozilla-mobile#4190: Decouple safe browsing api from the tracking protection. r=Amejia481 a=Amejia481



Co-authored-by: Arturo Mejia <[email protected]>

Merge mozilla-mobile#4143

4143: CCloses mozilla-mobile#4125: Fragment.consumeFrom(): Temporarily check whether fragment is added. r=Amejia481 a=pocmo



Co-authored-by: Sebastian Kaspari <[email protected]>

Merge mozilla-mobile#4081

4081: Bug 1572796 - Improve service-experiments public API docstrings r=travis79 a=travis79

As part of Doc Days of Summer 2019 2.0, improves the docstrings of the public API classes and especially the exposed methods and properties.

### Pull Request checklist
<!-- Before submitting the PR, please address each item -->
- [ ] **Quality**: This PR builds and passes detekt/ktlint checks (A pre-push hook is recommended)
- [ ] **Tests**: This PR includes thorough tests or an explanation of why it does not
- [ ] **Changelog**: This PR includes [a changelog entry](https://github.com/mozilla-mobile/android-components/blob/master/docs/changelog.md) or does not need one
- [ ] **Accessibility**: The code in this PR follows [accessibility best practices](https://github.com/mozilla-mobile/shared-docs/blob/master/android/accessibility_guide.md) or does not include any user facing features

### After merge
- [ ] **Milestone**: Make sure issues closed by this pull request are added to the [milestone](https://github.com/mozilla-mobile/android-components/milestones) of the version currently in development.
- [ ] **Breaking Changes**: If this is a breaking change, please push a draft PR on [Reference Browser](https://github.com/mozilla-mobile/reference-browser) to address the breaking issues.

Co-authored-by: Travis Long <[email protected]>

Pre-release preparation for version 7.0.0

Set version to 6.0.2.