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

========

https://hg.mozilla.org/integration/gaia-2_0/rev/37ae896ab4e7
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #22187 from mcav/kill-unused-connections

Bug 1042197 - [Email] Close IMAP connections. r=asuth

========

https://hg.mozilla.org/integration/gaia-2_0/rev/5fa6397cdfc8
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #22186 from mcav/improved-retry-logic

Bug 1042190 - [Email] Improve IMAP retry logic. r=asuth

========

https://hg.mozilla.org/integration/gaia-2_0/rev/e79750375435
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #22092 from millermedeiros/1042422-refresh-disabled

Bug 1042422 - [B2G][Calendar] Refreshing calendar causes events to be pu.lled down for accounts that are disabled r=gaye

========

https://hg.mozilla.org/integration/gaia-2_0/rev/217510a131a6
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #22003 from jaoo/1038749

Bug 1038749 - [B2G][Audio Channel]After playing sound through front speaker, all sound will play through front speaker instead of speakerphone. r=etienne
Bumping manifests a=b2g-bump