[Bug]: Unity: MetaMaskUnityUIHandler lost between scenes

### SDK

Unity

### Provide environment information

Unity 2022.3.25f1

### MetaMask SDK Version

2.1.0

### MetaMask Mobile app Version

7.27.0

### What browser are you using? (if relevant)

_No response_

### How are you deploying your application? (if relevant)

_No response_

### Describe the Bug

The MetaMaskUnityUIHandler isn't shared between scenes. If I initialize the MetaMask SDK in the Boot Scene and then try to call the Connect function in another scene, there is no UI response, but MetaMask still attempts to connect somehow.

### Expected Behavior

MetaMaskUnityUIHandler should persist between scenes OR spawn every time it's needed.

### Link to reproduction - Issues with a link to complete (but minimal) reproduction code will be addressed faster

_No response_

### To Reproduce

1. Create 2 scenes (e.g Boot and Main)
2. Initialize MM at Boot (manually or automatically)
3. Go to Main Scene
4. Call Connect() function