Bring managed iOS client to feature parity

clients/apple/dotnet/VoiceCat.iOS/build-broadcast-extension.sh

@@ -9,6 +9,10 @@ script_dir="${0:A:h}"
 project="$script_dir/../../iOS/VoiceCatiOS.xcodeproj"
 
 mkdir -p "$output"
+signing=()
+if [[ "$sdk" == "iphonesimulator" ]]; then
+  signing+=(CODE_SIGNING_ALLOWED=NO)
+fi
 xcodebuild \
   -project "$project" \
   -target VoiceCatBroadcast \
@@ -16,5 +20,12 @@ xcodebuild \
   -sdk "$sdk" \
   -arch "$architecture" \
   CONFIGURATION_BUILD_DIR="$output" \
-  CODE_SIGNING_ALLOWED=NO \
+  "${signing[@]}" \
   build
+
+xcent="$script_dir/../../iOS/build/VoiceCatiOS.build/${configuration}-${sdk}/VoiceCatBroadcast.build/VoiceCatBroadcast.appex.xcent"
+if [[ -f "$xcent" ]]; then
+  cp "$xcent" "$output/VoiceCatBroadcast.xcent"
+else
+  cp "$script_dir/../../iOS/VoiceCatBroadcast/VoiceCatBroadcast.entitlements" "$output/VoiceCatBroadcast.xcent"
+fi