Auto merge of #50079 - NickAtAccuPS:android_abstract_socket, r=sfackler

Android abstract unix domain sockets AddressKind correction

The prior check causes abstract unix domain sockets to return AddressKind::Unnamed instead of AddressKind::Abstract on Android.

Other than the immediately proceeding comment "macOS seems to return a len of 16 and a zeroed sun_path for unnamed addresses" the check as-implemented does not seem to have alternative explanation. I couldn't find an alternative explanation while stepping though git blame. I suspect the AddressKind::Unnamed nonzero check should instead be if macos, length 16, and zeroed array. @sfackler could you comment on this, the code as-is is the same from your initial addition of abstract uds support.

src/libstd/sys/unix/ext/net.rs

@@ -214,7 +214,10 @@ impl SocketAddr {
         let path = unsafe { mem::transmute::<&[libc::c_char], &[u8]>(&self.addr.sun_path) };
 
         // macOS seems to return a len of 16 and a zeroed sun_path for unnamed addresses
-        if len == 0 || (cfg!(not(target_os = "linux")) && self.addr.sun_path[0] == 0) {
+        if len == 0
+            || (cfg!(not(any(target_os = "linux", target_os = "android")))
+                && self.addr.sun_path[0] == 0)
+        {
             AddressKind::Unnamed
         } else if self.addr.sun_path[0] == 0 {
             AddressKind::Abstract(&path[1..len])