Android Question how to set key permissions

hi, All
When I release a app, and install it to the phone. I got a screenshot as 2.jpg
in this pic, my app key permissions : storage status is not selected.
So how can I set this permission default status as selected as in 1.jpg.
and I have add these text in manifest.
AddPermission(android.permission.WRITE_EXTERNAL_STORAGE)
AddPermission(android.permission.READ_EXTERNAL_STORAGE)

Thanks