[EMSUSD-1845] 'Tear off copy..' Maya viewport function defaults to perspective view if looking through UFE camera

**Describe the bug**

When looking through UFE camera, clicking 'Tear off copy..' in Maya would cause the newly viewport fallback to be default perspective camera.
This does not happen for native Maya camera, e.g. "persp1" (see attached GIF).

**Steps to reproduce**
Steps to reproduce the behavior:
1. Launch Maya
2. Create a USD proxy shape from any USD camera scene (see super simple example below):
```
#usda 1.0
(
defaultPrim = "root"
metersPerUnit = 0.01
upAxis = "Y"
)

def Xform "root"
{
def Camera "testCam"
{
float3 xformOp:rotateXYZ = (-41.738354, -18.2, 0)
double3 xformOp:translate = (-1.7836315683895845, 5.094853768457956, 5.424946234822715)
uniform token[] xformOpOrder = ["xformOp:translate", "xformOp:rotateXYZ"]
}
}
```
3. Look through the UFE camera
4. Click the 'Tear off copy..' menu item
5. The newly created panel still shows the default perspective camera

**Expected behavior**
'Tear off copy..' works as expected for UFE camera.

**Attachments**

**Specs (if applicable):**
- OS & version CentOS 7.8
- Compiler & version gcc 6.3
- Maya version Maya-2023.3.3
- Maya USD commit SHA official v0.30.0
- Pixar USD commit SHA v22.05 & v24.03