should
Check whether the app should display a message explaining why a certain permission is needed. successCallback is called with true if the app should display a message, false otherwise. This message is only displayed if the user has revoked this permission once before, and if the permission dialog will be shown to the user (the user can choose to not be shown that dialog again). For devices before Android M, this always returns false. See permissionAwareActivity.shouldShowRequestPermissionRationale.