fix: fail to synchronize animation state in owner authoritative mode

[superztf]

Using NetworkAnimator by owner authoritative(not server authoritative) has some problems with synchronizing animation state, parameters and trigger.
Especially synchronizing animation state, NetworkAnimatorStateChangeHandler.FlushMessages missed checking m_SendAnimationUpdates.
On the other hand, the condition NetworkManager.ConnectedClientsIds.Count - 2 > 0 to judge broadcast animation info(state, parameters, trigger) was not correct. NetworkManager.ServerClientId is not a element of NetworkManager.ConnectedClientsIds.

So NetworkAnimator cannot work by owner authoritative way.

By the way, I read Pull Request Submission Guidelines, But I am still not really sure how to participate in contributing and I can't log in to https://jira.unity3d.com/
I would like to be informed of the detailed steps.

Changelog

• Fixed: Synchronize animation state in owner authoritative mode

Testing and Documentation

• No tests have been added.
• No documentation changes or additions were necessary.

[unity-cla-assistant]

All committers have signed the CLA.

[NoelStephensUnity]

Hello @superztf !
Thank you for your contribution.
PR-2127 addresses this issue so I am closing out this PR.