CameraXBasic does not ask for WRITE_EXTERNAL_STORAGE permissions

Trying the exemple in a Samsung Tablet with Android 8 the PermissionsFragment class always shows a Toast

"Permission request denied"

I noticed that the only permission asked with registerForActivityResult is the CAMERA permission, and not the WRITE_EXTERNAL_STORAGE

Adding
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
in the manifest solve the bug
