Kosmos utility for making Snapshot state unconfined.

I'm adding a usage in a downstream CL and am seeing some usages starting
to pop up as we gradually adopt the use of compose state in
non-composables as per go/sysui-arch:summer-24

Bug: 387321113
Test: verified with a unit test in a followup CL on this chain
Flag: TEST_ONLY
Change-Id: I5109b0f51adb64a61f1903080f47ec51e1297626