Migrate to cargo_embargo. am: 8d81961642 am: 4c8bbe6739

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/pin-project-internal/+/2829873

Change-Id: Ibc6a3b4bcdad053cac0bb1f79df7d34589082b8f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>