Wire realtime WebRTC native media into Bazel (#17145)

- Builds codex-realtime-webrtc through the normal Bazel Rust macro so
native macOS WebRTC sources are included.\n- Shares the macOS -ObjC link
flag with Bazel targets that can link libwebrtc.

---------

Co-authored-by: Codex <noreply@openai.com>

MODULE.bazel

@@ -40,9 +40,17 @@ osx.frameworks(names = [
     "ColorSync",
     "CoreFoundation",
     "CoreGraphics",
+    "CoreImage",
+    "CoreMedia",
+    "CoreMIDI",
     "CoreServices",
     "CoreText",
+    "CoreVideo",
+    "DiskArbitration",
     "AudioToolbox",
+    "AVFoundation",
+    "AVFAudio",
+    "AVRouting",
     "CFNetwork",
     "FontServices",
     "AudioUnit",
@@ -50,11 +58,19 @@ osx.frameworks(names = [
     "CoreAudioTypes",
     "Foundation",
     "ImageIO",
+    "IOSurface",
     "IOKit",
     "Kernel",
+    "Metal",
+    "MetalKit",
+    "OpenGL",
     "OSLog",
+    "QuartzCore",
+    "ScreenCaptureKit",
     "Security",
     "SystemConfiguration",
+    "UniformTypeIdentifiers",
+    "VideoToolbox",
 ])
 use_repo(osx, "macos_sdk")
 
@@ -345,6 +361,23 @@ crate.annotation(
 
 inject_repo(crate, "llvm", "llvm-project", "macos_sdk")
 
+crate.annotation(
+    # Provide the hermetic SDK path so the build script doesn't try to invoke an unavailable `xcrun --show-sdk-path`.
+    build_script_data = [
+        "@macos_sdk//sysroot",
+    ],
+    build_script_env = {
+        "WEBRTC_SYS_DARWIN_SDK_PATH": "$(location @macos_sdk//sysroot)",
+        "WEBRTC_SYS_LINK_OUT_DIR": "1",
+    },
+    crate = "webrtc-sys",
+    gen_build_script = "on",
+    patch_args = ["-p1"],
+    patches = [
+        "//patches:webrtc-sys_hermetic_darwin_sysroot.patch",
+    ],
+)
+
 # Fix readme inclusions
 crate.annotation(
     crate = "windows-link",