Upgrade unicode-ident to 1.0.8 am: 2114a5cf0e am: 72096f9506 am: 77d0a1d873 am: 6cb13db86f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/unicode-ident/+/2514756

Change-Id: I25ead8d6435b9ecc9aa170dc566f1fdc0b2808b0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>