Bug 944271 - [OTA][Data Migration][Clock] The alarm events will...
   be lost after update from v1.1 to v1.2

Adds a routine to startup.js to convert old Alarm entries to the
new format.

(cherry picked from commit 979a3db21abd154efef337686e7a15d846c3d65f)
Merge pull request #14614 from Rik/call-screen-banner-multiline-946742

Bug 946742 - Message overlapped during multiparty when a call is released r=etienne
(cherry picked from commit 0ee9b91a5cf770c099ecaeaadf85fec9c493f53d)