Upgrade libfuzzer-sys to 0.4.7 am: 9b2cd52a95 am: a1a5bf19c1

Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/libfuzzer-sys/+/2945321

Change-Id: I2005c3d16a543c47cc4a26d8204e140ac338cbc5
Signed-off-by: Automerger Merge Worker <[email protected]>