Firemonkey android read_phone_state runtime permission asks to get IMEI

How can I get read_phone_state permission at runtime to get IMEI number?

  if not HasPermission('android.permission.READ_PHONE_STATE') then
     begin

      //ASK AND GET PERMISSION ?

     end;


function TForm1.HasPermission(const Permission: string): Boolean;
begin
  //Permissions listed at http://d.android.com/reference/android/Manifest.permission.html
{$IF RTLVersion >= 30}
  Result := TAndroidHelper.Context.checkCallingOrSelfPermission(
{$ELSE}
  Result := SharedActivityContext.checkCallingOrSelfPermission(
{$ENDIF}
    StringToJString(Permission)) =
    TJPackageManager.JavaClass.PERMISSION_GRANTED;


end;