Bug 1053276 - [Messages] ActivityHandler tests are failing if the test agent is hidden r=azasypkin
Bug 1050431: Remove unnecessary 'flex' decls from video.css (equivalent to default values). r=djf
Bug 1002545 - Switching to b2g desktop builds
Bug 998906 - [Music] display the correct overlay after the enumeration in ListView
Bug 1035775 - [B2G][System] support 24 hour time format

- add timeformatchange listener
Merge pull request #22841 from julienw/1053276-fix-activity-handler-tests

Bug 1053276 - [Messages] ActivityHandler tests are failing if the test a...
Merge pull request #18926 from dominickuo/bug-998906

Bug 998906 - [Music] display the correct overlay after the enumeration in ListView, r=jimporter
Merge pull request #22867 from yurenju/pull/22765

Bug 1002545 - Switching to b2g desktop builds r=yurenju
Merge pull request #22854 from dholbert/1050431-remove-lines

Bug 1050431: Remove unnecessary 'flex' decls from video.css (equivalent to default values). r=djf
Merge pull request #22757 from gasolin/issue-1035775

Bug 1035775 - [B2G][System] support 24 hour time format, r=alive
Revert "Merge pull request #22867 from yurenju/pull/22765"

This reverts commit 5f51ff804b815033cd71e750c52cf19fd3950f29, reversing
changes made to 67f0e561b524f1e80468e9536a65cd7db6fcb8cb.