Migrate to cargo_embargo. am: 566a910942 am: 899246581f

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/tinytemplate/+/2828073

Change-Id: I4478925d422a7fb7962ab2f3c590c1393a52a236
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>