Receive results to the permission request issued from the fragment.

Fixes #11808

app/src/main/java/org/thoughtcrime/securesms/avatar/picker/AvatarPickerFragment.kt

@@ -244,4 +244,8 @@ class AvatarPickerFragment : Fragment(R.layout.avatar_picker_fragment) {
       }
       .execute()
   }
+
+  override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
+    Permissions.onRequestPermissionsResult(this, requestCode, permissions, grantResults)
+  }
 }