title: What is the use of <permission-group> in android?
body: <p>From android documentation, Its clear that
  Using "permission-group" we can create a permission group.
  Using "permission" element in android manifest file, we can define a permission.
  This permission can be added to permission-group.</p>
  
  <p>if we name this permission-group as "com.example.permission-group"
  can we use it in another application using "uses-permission".
  If we can use, whether can we access all the permissions of this group.</p>
  
  <p>If the above case is wrong, Then how can we make use of "permission-group"</p>