Merge pull request #16093 from punamdahiya/Bug969475

Bug969475 - [Settings][Sound] - Fix of select ring tone and alert tone flow does not work in FF Nightly r=gduan
Bug 968832 - [Rocketbar] Basic URL functionality r=benfrancis
Merge pull request #16046 from KevinGrandon/bug_968832_rocketbar_url_editing

Bug 968832 - [Rocketbar] Basic URL functionality
Bug 969642 - SV: Network indicator in settings customize by SIM
Merge pull request #16051 from yzen/957674

Bug 957674 - adding an easy way to enable/disable a screen reader. r=alive
Bug 970458 - Disable failing clock tests on TBPL/Gu a=testonly r=me
Merge pull request #15970 from AndreiH/bug968083

Bug 968083 - Intermittent fail in test_import_contacts_from_sim
Bug 970521: Fix typo in apps/system/js/bootstrap.js.
Bug 961599 - [Clock] Sound selection list laylout offset when select a long list. r=millermedeiros
Merge pull request #16058 from mcav/progressive-sound

Bug 961599 - [Clock] Sound selection list laylout offset when select a l...
Bug 963326 - [B2G][Clock] Delete button easily selectable while selecting word suggestions when editing an alarm.
Merge pull request #16146 from mcav/delete-button

Bug 963326 - [B2G][Clock] Delete button easily selectable while selecting word suggestions when editing an alarm. r=millermedeiros
Bug 958200 - [Camera] Update Camera app to use new CameraControl API
Merge pull request #15996 from dmarcos/bug958200

First working version
Bug 969650 - Subtree merge of yurenju/gaia-distribution-sample
Bug 963917: reduce Gallery memory use (and fix leak) while scanning

force software canvases for thumbnail and preview creation with willReadFrequently

Free canvas memory after creating a thumbnail

Make sure our thumbnail blobs are file-backed not memory-backed

update mediadb docs
(cherry picked from commit 4b5eaa4a2823d8961b80a3b975b1eeed92b9fcb7)

Conflicts:

	apps/gallery/js/MetadataParser.js
	apps/gallery/js/gallery.js
Bug 917537 - Turn back on modify_event_test.js it was disabled because of intermittent failures
Bug 966726 - Web result icon styling
Merge pull request #16150 from KevinGrandon/bug_966726_eme_styling_followup

Bug 966726 - Web result icon styling
Bug 968569 - [LockScreen] Set LockScreen's background as an individual element to boost performance