Add no_std version of library, with different set of features enabled. am: 60b657631f am: c6af0a407b am: a6eaa7f8a0 am: b465a99820 am: 4965fc4a2d

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/spin/+/2064987

Change-Id: I353f33e52602a7b32e4db74d1c930f3dcc4aad7c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>