4979: Add the Glean SDK version to Sentry tags r=pocmo a=Dexterp37
Co-authored-by: Alessio Placitelli <alessio.placitelli@gmail.com>

4973: Fix changelog: dataprotect changes in wrong release r=pocmo a=grigoryk

#4958 didn't land in time for 20, but its changelog entries went into 20.
Co-authored-by: Grisha Kruglov <gkruglov@mozilla.com>

4960: Import strings from android-l10n. r=pocmo a=mozilla-l10n-automation-bot

n/t
Co-authored-by: Mozilla L10n Automation Bot <release+l10n-automation-bot@mozilla.com>

4955: Closes #4682: Add support for browser.tabs.remove r=Amejia481 a=csadilek

Brings in support for `browser.tabs.remove`. All very similar to what we did for `browser.tabs.add`. Refactored / Broke apart the tests so each one only verifies one behaviour.
Co-authored-by: Christian Sadilek <christian.sadilek@gmail.com>

4958: Password sync support r=pocmo a=grigoryk

This does a few things in order to enable password syncing.

Our underlying storage for passwords is encrypted at rest. This means that we need to keep the passwords storage layer unlocked for the duration of a sync, which is what this PR achieves.

In order to keep password storage layer unlocked, we need to be able to access the encryption key from the worker. To achieve that, worker is now using the new `KeySharedPreferences` API to obtain a `passwords_key`.

`KeySharedPreferences` was added to make it easier to transparently store key/values pairs such that `value` is encrypted at rest, protected by a key which is stored in AndroidKeyStore. Due to issues with the AndroidKeyStore for API versions prior to 23, on those older API levels `KeySharedPreferences` simply delegates to SharedPreferences, without any encryption.

`KeySharedPreferences` supports an API upgrade scenario when going from pre-API23 to post-API23, but not the other way.
Co-authored-by: Emily Kager <ekager@mozilla.com>
Co-authored-by: Grisha Kruglov <gkruglov@mozilla.com>

4970: No issue: Fixes download file string for l10n r=Delphine a=sblatz
Co-authored-by: Sawyer Blatz <sdblatz@gmail.com>

4961:  Docs update (20191105-121227) [ci skip] r=pocmo a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

4684: Closes #4679 - lower download notification importance for Android O+ r=pocmo a=pt2121
Co-authored-by: prat t <banqfirn@gmail.com>

4959: Experiments: Make version comparisons more tolerant of invalid versions r=ekager a=mythmon

Fixes #4957
Co-authored-by: Mike Cooper <mythmon@gmail.com>

4939:  Closes #4629: Add Gecko WebPush implementation  r=rocketsroger a=jonalmeida
Co-authored-by: Jonathan Almeida <jalmeida@mozilla.com>

Fixes #4957

4947:  GeckoView update (nightly) (20191104-141241) r=Amejia481 a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

4919: Closes #3486 - Implement Web Share API r=Amejia481 a=NotWoods

ShareData is a separate data class so that Web Share Target can use it down the line.
Co-authored-by: Tiger Oakes <toakes@mozilla.com>

4934: Closes #4917: Adds onCancelDownload callback  r=csadilek a=sblatz
Co-authored-by: Sawyer Blatz <sdblatz@gmail.com>

4948:  GeckoView update (beta) (20191104-141252) r=Amejia481 a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>