Remove netlink getifaddrs implementation on Android in favor of libc::getifaddrs (#508)

* Remove android-specific ifaddrs implementation

* Remove `cc` as a build dependency in `util/`

Author: jamilbk

Cargo.lock

@@ -42,9 +42,6 @@ winapi = { version = "0.3.9", features = [
     "ws2ipdef",
 ] }
 
-[build-dependencies]
-cc = "1"
-
 [dev-dependencies]
 tokio-test = "0.4"
 env_logger = "0.10"