Upgrade rust/crates/syn-mid to 0.5.1 am: 0d7fd466c4 am: 9d9da34d5e

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/syn-mid/+/1474976

Change-Id: Ic180dcaf505555fd57e03f5409dd274adfaa5ea0