Merge pull request #19914 from gasolin/issue-938467

Bug 938467 - gUM permission grant scenario - remember my choice support, r=alive
Bug 1018836 - Fix immediate transition issues
Bug 876632 - Service numbers (SDN) not imported from the SIM
Merge pull request #19759 from dominickuo/bug-937937-all

Bug 937937 - [All] Set proper volumeControlChannel to AudioChannelManager in all the core apps, r=alivedise
Merge pull request #19803 from alivedise/bugzilla/1017536/null-frame-for-screenshot

Bug 1017536 - Check the broken frame in cardsview, r=timdream
Bug 1020088 - [Bluetooth]Missing images
Merge pull request #20008 from pivanov/bug-1020088

Bug 1020088 - [Bluetooth]Missing images
Bug 1019220 - Settings Icons need improvements
Merge pull request #19671 from azasypkin/bug-963013-visual-styles

Bug 963013 - [Messages][Refresh] Update bubbles style and layout of the thread. Updated message bubble styles. r=schung
Bug 1020903 - Missing splash icon when an application is hosted via https

With the way the URI was constructed before, if https was used with
default port, a.port would be empty and port 80 would wrongly be used.
Instead, we now use the origin as it is.
Merge pull request #20003 from stasm/1020260-qps-plocm-ftu

Bug 1020260 - Add qps-plocm to the list of RTL locales in FTU. r=fcampo
Bug 1013585 - Intermittent gaia-build "Automation Error: mozprocess timed out after 330 seconds running ['make', 'build-test-integration', 'NPM_REGISTRY=http://npm-mirror.pub.build.mozilla.org', 'REPORTER=mocha-tbpl-reporter'] | timed out after 330 seconds of no output
Bug 1016541 - Thread and Composer. The input placeholder text (Message) should be italic
Bug 1020403 - Change button type to button to prevent click event on submit
Bug 1002581 - Include new strings for enabling geolocation for Find My Device.
Bug 1019911 - Migrate python tests to vertical homescreen. wait for homescreen to load in setUp
Bug 992085 -  While swiping, enable user to remain in portrait mode when  a landscape app is encountered and vice versa.
Merge pull request #20061 from zacc/bug_1019911

Bug 1019911 - Migrate python tests to vertical homescreen. wait for home...
Bug 1017203 - Throttle rate of position updates for Find My Device.
Bug 1016233 - [Collections App] Collection UI styling