1abdb71230
Provide developer APIs to discover application-specific paths on secondary external storage devices. Covers files, cache, and OBB directories. Apps will not have write access outside their package- specific directories on secondary devices, so only primary storage is exposed through Environment. Creation of .nomedia files will be handled by FUSE daemon in future change. Change-Id: Ifcce6201a686d80269d7285adb597c008cf8fa7c