Bug 883763 - Fix localizability of "Cell broadcast service"

Update data-l10n-id to the real string
music2 app prototype
Merge pull request #10611 from es92/music2-squashed

Prototype Music2 App
Merge pull request #10492 from flodolo/bug883763

Bug 883763 - Fix localizability of "Cell broadcast service", r=kaze
Revert "Merge pull request #10611 from es92/music2-squashed"

This reverts commit 16c6bd66d7685fdc8abd2d841243a3ca69413bb9, reversing
changes made to 14367fe868af13c63548d57fd1e2dea0134e65fa.
Merge pull request #10613 from davidflanagan/revert-music2

Revert "Merge pull request #10611 from es92/music2-squashed"
Bug 886446 - [email] Partition card loading, cache initial card HTML for fast startup