Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/19a54c7df636
Author: Guillaume C. Marty <edo999@gmail.com>
Desc: Merge pull request #22574 from gmarty/Bug-1042105-Icon-prioritization-Dual-Status-bar

Bug 1042105 - [User Story] Icon prioritization in the status bar

========

https://hg.mozilla.org/integration/gaia-central/rev/1a54064e462f
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1042105 - [User Story] Icon prioritization in the status bar

========

https://hg.mozilla.org/integration/gaia-central/rev/adde8b85ebc2
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #22671 from gtorodelvalle/callscreen-bug-1050196-place-second-call-button-status

Bug 1050196 - [Dialer] Follow up of bug 1024506 - Place new call button momentarily enabled while establishing a second call

========

https://hg.mozilla.org/integration/gaia-central/rev/004c5b67a2d6
Author: German Toro del Valle <gtorodelvalle@gmail.com>
Desc: Bug 1050196 - [Dialer] Follow up of bug 1024506 - Place new call button momentarily enabled while establishing a second call
Bumping manifests a=b2g-bump