Bug 789217 - 0001. Add skeleton for keystore. r=khuey
Bug 789217 - 0002. Implement keystore. r=qdot
Bug 789217 - 0003. Bring up keystore. r=khuey
Bug 923173 - Use NS_WARNING for unexpected name to avoid crashing. r=ehsan
Bug 924787 - [AudioManager] The checking condition should be "leave here if settings name is not for bt_sco". r=mwu
Bug 923848 - Reuse mp3 file format check result. r=doublec