DatagramSocket.getLocalAddress() is not returning the local address on Mac OS

### Please provide a brief summary of the bug

Tested in 1.8.0_272/25.272-b10 and 1.8.0_322/25.322-b06 on Mac OS, use DatagramSocket to open a remote connection and then query the address of the local side of the connection. Seems to work well on Windows and Linux, but returns a zero address on Mac OS.

### Please provide steps to reproduce where possible

Test code to reproduce: [https://github.com/cowtowncoder/java-uuid-generator/blob/master/src/main/java/test/EgressDiagnostics.java](https://github.com/cowtowncoder/java-uuid-generator/blob/master/src/main/java/test/EgressDiagnostics.java)

### Expected Results

Local address of the connection is returned, as it is on Windows: [https://github.com/cowtowncoder/java-uuid-generator/pull/56#issuecomment-1214415012](https://github.com/cowtowncoder/java-uuid-generator/pull/56#issuecomment-1214415012)

### Actual Results

On Mac OS, the local address is reported as zeroes: [https://github.com/cowtowncoder/java-uuid-generator/pull/56#issuecomment-1214489004](https://github.com/cowtowncoder/java-uuid-generator/pull/56#issuecomment-1214489004)

### What Java Version are you using?

1.8.0_322-b06

### What is your operating system and platform?

java.runtime.version: 1.8.0_322-b06
java.vm.name: OpenJDK 64-Bit Server VM
java.vm.vendor: Temurin
java.vm.version: 25.322-b06
os.arch: x86_64
os.name: Mac OS X
os.version: 10.15.7

### How did you install Java?

_No response_

### Did it work before?

_No response_

### Did you test with other Java versions?

_No response_

### Relevant log output

_No response_

Start by running the linked EgressDiagnostics.java reproduction on macOS with the reported Java version, then compare DatagramSocket.getLocalAddress() with the Windows result described in the issue. Trace the relevant Java networking implementation or upstream ownership to identify where the zero address is produced. Done means the local address is reported correctly for a connected datagram socket on macOS.

Written by the indexing model from the issue text.