Bug 1074051 - [Settings] sound volume is not changed. Patch v2.0
Bug 1089529 - Lockscreen error after screen off and on when device shows NFC shrinking UI
Merge pull request #25990 from snowmantw/bug1089529-2.0

Bug 1089529 - Lockscreen error after screen off and on when device shows...
Bug 1048673 - [Ringtones] stop the previews before leaving the app
Bug 1085201 - [Flame][Tako][v2.1][Settings] "Searching device" not hidden as Sony SBH50 BTHS paired via NFC
Bug 1043762 - Volume buttons don't do anything in Settings and previewing new ringtones
Bug 1083053 - [Midori] The screenshot preview window still overlays an app when switching apps
Bug 1091137 - [ringtones] Fix clearing out the tonePlayer's state when hiding the app

Conflicts:
	apps/ringtones/js/tone_player.js
 Bug 998106 - [B2G][Gaia][FTE][Keyboard] Selecting languages other than
 English during the FTE causes the associated keyboard not to load.
  - Filter out "language to layouts mappings" if the layout is not
    preloaded.
Merge pull request #25608 from mancas/bug1074051_v2.0

Bug 1074051 - [Settings] sound volume is not changed. Patch v2.0
Bug 1069157 - [PDF Viewer] update pdf.js in Gaia

Conflicts:
	apps/pdfjs/content/build/pdf.js
	apps/pdfjs/content/build/pdf.worker.js
	apps/pdfjs/content/web/viewer.html
	apps/pdfjs/content/web/viewer.js
Revert "Bug 1069157 - [PDF Viewer] update pdf.js in Gaia"

This reverts commit 414f2ff5c7d000e151b970df3871f63082e4a300.
Merge pull request #25589 from nullaus/bug1077595

bug 1077595 - Use DataStoreChangeEvents to update Download API Manager c...
(cherry picked from commit e9ac899aff346b2cef9be154290978fc18d1bc8f)