Merge pull request #9651 from davidflanagan/dominickuo-bug-867448

Bug 867448 - [music] add a save option to music app open activity r=djf(cherry picked from commit c00f94deb7325b024f37ca7ee0e7c51417ef2c87)

Conflicts:

	apps/music/js/open.js
	apps/music/locales/music.en-US.properties
	apps/music/open.html