Bug 1019993 - Correct compositekey to compositeKey

Replace compositekey with compositeKey to follow interCaps coding
style guidelines.
Bug 1017918 - Add mai (Maithili) to Gaia languages
Bug 1020471 - WebrtcClient is not defined
Bug 1008987 - [Contacts][Merger] Thumbnail on contacts list disappear when importing same vCard/.vcf file several times
Bug 1021284 - [camera] [flame] spinner appears after every photo capture
Merge pull request #19968 from r-gaia-cs/bug-1019993

Bug 1019993 - Correct compositekey to compositeKey.
r=rudylu
Merge pull request #20301 from arcturus/bug-1020471

Bug 1020471 - WebrtcClient is not defined r=jmcf
Bug 1022132 - Disable test_a11y_unlock_to_homescreen.py
Bug 1023208 - [v2.0][v2.1] Fix test_marketplace_launch failure
Merge pull request #20294 from chirarobert/tap_mp_icon

Bug 1023208 - [v2.0][v2.1] Fix test_marketplace_launch failure
Merge pull request #20139 from wilsonpage/1021284

Bug 1021284 - [camera] [flame] spinner appears after every photo capture
Bug 1005823 - [Dialer] Fix emergency calls with no SIM card. r=rik
Merge pull request #19727 from DouglasSherk/1005823-emergency-call

Bug 1005823 - [Dialer] Fix emergency calls with no SIM card. r=rik
Merge pull request #20249 from TheoChevalier/patch-3

Bug 1017918 - Add mai (Maithili) to Gaia languages
Merge pull request #20298 from gitmai/bug-1008987-import-vcard

Bug 1008987 - [Contacts][Merger] Thumbnail on contacts list disappear wh...
r=jmcf