Camera: Add new UNDEFINED pose reference enum

The newly added UNDEFINED pose reference is used for a camera device
that cannot accurately measure its pose rotation and translation.
One such example is a camera on a foldable phone.

Bug: 119325027
Test: Camera CTS, and test_multi_camera_alignment
Change-Id: I0da7638e2bce31886f9dbf33dd2f74800d8768f7