Bug 919410 - Re-implement LockScreen in Canvas to solve the glitches issue
Bug 943246 - Smarter call screen background handling to prevent flashes.
r=rik
Merge pull request #14165 from etiennesegonzac/bug-943246-call-screen-background-tweaks

Bug 943246 - Smarter call screen background handling to prevent flashes. r=rik
Merge pull request #13732 from snowmantw/issue919410

Bug 919410 - Re-implement LockScreen in Canvas to solve the glitches issue
Bug 923063 - Polish for incoming call in the call screen