Upgrade spin to 0.9.8 am: a8300fc8f3

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/spin/+/2950185

Change-Id: I6344484575e41b46e3e938cd56992e976def4f4a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>