Fix User Level READ_EXTERNAL_STORAGE Permission

* This app requires READ_EXTERNAL_STORAGE permission in order to play
music on external storage. As it was a system library, such permission
wasn't required before. However, to develop it using IDEs and deploy it
on device without flashing, we need it to request permissions properly.

Bug: 34748293
Test: mm -j 40
Change-Id: I463e74ff458b57c5e54238fba0d04237819dd0fa
2 files changed