code: public void grantPolicy(@NonNull ComponentName admin, int usesPolicy) {
      enforceActiveAdmin(admin);
      Set<Integer> policyGrantedSet = adminPolicyGrantedMap.get(admin);
      if (policyGrantedSet == null) {
        policyGrantedSet = new HashSet<>();
        policyGrantedSet.add(usesPolicy);
        adminPolicyGrantedMap.put(admin, policyGrantedSet);
      } else {
        policyGrantedSet.add(usesPolicy);
      }
    }
docs: Grants a particular device policy for an active ComponentName.
  
  @param admin the ComponentName which DeviceAdminReceiver this request is associated with. Must
  be an active administrator, or an exception will be thrown. This value must never be null.
  @param usesPolicy the uses-policy to check