Bug 1079692: update video thumbnail title asynchonously so we don't block when the user rotates the phone

fix spelling error in method name
(cherry picked from commit c03c7e97ee867749f94ca523b239c0e5c74ece16)

Merge pull request #25046 from russnicoletti/bug-1079692

Bug 1079692 --  [Flame][Woodduck][Free Test][Video] Make video title truncation code more efficient r=djf(cherry picked from commit 8ff816af5a665b9e1acef49b4163a4fbea48b54a)

update test busted by spelling correction
(cherry picked from commit 6c3e0f2311550da687ad5169521b159e6b94f37e)