Allow apps to read packagemanager_config_prop

To fix regression of CTS privappPermissionsMustBeEnforced

Bug: 159647344
Test: atest PrivappPermissionsTest#privappPermissionsMustBeEnforced
Change-Id: I88af05305f9aef6e813d0a72adad63b6b8f99487
Merged-In: I88af05305f9aef6e813d0a72adad63b6b8f99487
2 files changed