5170: 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>

5157: For mozilla-mobile/fenix#5540: add 'no internet' error r=Amejia481 a=Baron-Severin
Co-authored-by: Severin Rudie <srudie@mozilla.com>

5153: Closes #5058: Migrate UserInteractionHandler from reference-browser to support-base r=jonalmeida a=gabrielluong

This fixes #5058. 

- Copies BackHandler to UserInteractionHandler, and add onHomePressed from [`UserInteractionHandler`](https://github.com/mozilla-mobile/reference-browser/blob/master/app/src/main/java/org/mozilla/reference/browser/UserInteractionHandler.kt

).
- Added Deprecated message for BackHandler
- Introduces a generic UserInteractionHandler to handle any user interactions such as the existing 'back' button pressed, and 'home' button pressed.
Co-authored-by: Gabriel Luong <gabriel.luong@gmail.com>

5163: Closes #5145: Remove INFO Tag from Socorro Java Stack Trace r=pocmo a=rocketsroger
Co-authored-by: Roger Yang <royang@mozilla.com>

5059: Ecosia r=pocmo a=mkaply

Add Ecosia search plugin for Germany.
Co-authored-by: Michael Kaply <345868+mkaply@users.noreply.github.com>

5151: Fixes #5150: Passes most recent download state to notification r=csadilek a=sblatz
Co-authored-by: Sawyer Blatz <sdblatz@gmail.com>

5159: AbstractFetchDownloadService: Remove notifications when task gets removed. r=csadilek a=pocmo

For https://github.com/mozilla-mobile/fenix/issues/6570

Co-authored-by: Sebastian Kaspari <s.kaspari@gmail.com>

5160:  GeckoView update (nightly) (20191126-140409) r=pocmo a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

5158: Bug 1587765 - Support UTF-8 characters in commit messages r=pocmo a=JohanLorenzo
Co-authored-by: Johan Lorenzo <jlorenzo@mozilla.com>

5154: 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>

5105: 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>

5146: Closes #5144: Fix GeckoWebPushHandler API signature update r=pocmo a=jonalmeida
Co-authored-by: Jonathan Almeida <jalmeida@mozilla.com>

5125: Closes #4398: Add reader state to browser-state r=pocmo a=csadilek

Closing #4398 to bring in the state required for reader mode so we can port it over soon. Nothing new here, following the existing pattern, and as discussed in https://github.com/mozilla-mobile/android-components/issues/4398#issuecomment-531128780

. 
Co-authored-by: Christian Sadilek <christian.sadilek@gmail.com>

5138:  Docs update (20191124-120742) [ci skip] r=jonalmeida a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

5140:  GeckoView update (beta) (20191125-140548) r=pocmo a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

5139:  Docs update (20191125-120647) [ci skip] r=pocmo a=MickeyMoz
Co-authored-by: MickeyMoz <sebastian@mozilla.com>

5129: Allow Glean to be substituted for local development r=Dexterp37,travis79 a=badboy
Co-authored-by: Jan-Erik Rediger <janerik@fnordig.de>

5047: Fixes #5046: Updates guessFileName to use uniqueFIleName r=csadilek a=sblatz



5133: Closes #5077: Renames onDownloadCompleted r=NotWoods a=sblatz
Co-authored-by: Sawyer Blatz <sdblatz@gmail.com>

5130: Upgrade Glean to 21.2.0 r=mdboom a=mdboom
Co-authored-by: Michael Droettboom <mdboom@gmail.com>