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
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
Merge pull request #22186 from mcav/improved-retry-logic

Bug 1042190 - [Email] Improve IMAP retry logic. r=asuth
Merge pull request #22187 from mcav/kill-unused-connections

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