Revert "Keep read/write external storage as built-in permissions"
am: 8ed9ece

* commit '8ed9ece93dca5c7266ca7d9c5fabe7c9a6b214e7':
  Revert "Keep read/write external storage as built-in permissions"

Change-Id: Ic52bb816d564076999ab7a220fd70a52228731b1