Update to version 0.3.0. am: ecf0949f47

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/vsock/+/2242080

Change-Id: I7bc2699bf9945700e870b7f107b5e2767ebc494d
Signed-off-by: Automerger Merge Worker <[email protected]>