NoHwServiceManager return true in registerForNotifications

Even though we will never notify the client, we can return true to
reduce the required changes to each of the clients.
We keep a reference to the callback so the old behavior doesn't change.

Test: launch_cvd with isHidlSupported returning false
Bug: 218588089
Change-Id: I6bf85b005732bd11180205492f95fc1da4a2f103
1 file changed