Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/04193a6ecea7
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #15653 from dominickuo/bug-946556

Bug 946556 - [Music] Disable the play controls when using a bluetooth headset in a call, r=jimporter

========

https://hg.mozilla.org/integration/gaia-central/rev/a22bf374bf23
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 946556 - [Music] Disable the play controls when using a bluetooth headset in a call
Bumping manifests a=b2g-bump