setSpeaker support & emit pushkit notification for ios for seamless & reliable voip calls on ios

[shivanshtalwar0]

In this pr i have introduced setSpeaker method which lets you toggle speaker on and off in sync with native call UI,
along with that i have introduced a pushkit event for dart side to handle cases such as when we want to notify app of call should hangup by using
something like this below when you send a pushkit notification on voip channel with alert so ios wont interpret it as another call and we can safely handle hangup.

callKeep.on<CallKeepPushPayload>((event) async {
      print('CallKeepPushPayload: ${event.payload}');
      final state = event.payload?['state'] ?? 'started';
      final eventType = event.payload?['eventType'] ?? '';
      if (state == 'ended' && eventType == 'call') {
        await endIncomingCall(event.payload?['uuid'] ?? '');
        return;
      }
    });

[Copilot]

Pull Request Overview

This PR introduces speaker control functionality and pushkit notification handling for iOS to enable seamless and reliable VoIP calls. The changes enable toggling speaker mode in sync with native call UI and provide a dart-side event for handling pushkit notifications that can be used for call hangup scenarios.

• Adds setSpeaker method to toggle speaker on/off for both iOS and Android platforms
• Introduces CallKeepPushPayload event for handling pushkit notifications on the Dart side
• Updates code formatting and styling throughout multiple files

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
lib/src/api.dart	Adds setSpeaker method and improves code formatting consistency
lib/src/actions.dart	Introduces CallKeepPushPayload event class
ios/Classes/CallKeep.m	Implements setSpeaker functionality and adds pushkit payload event emission
ios/Classes/CallKeep.h	Adds setSpeaker method declaration and CallKeepPushPayload constant
android/src/main/java/io/wazo/callkeep/VoiceConnectionService.java	Updates foreground service type and API annotations
android/src/main/java/io/wazo/callkeep/CallKeepModule.java	Implements setSpeaker functionality for Android
android/build.gradle	Updates Gradle version

Comments suppressed due to low confidence (2)

[Copilot]

The @RequiresApi annotation at class level requires API 23+, but the startForegroundService method has @RequiresApi(api = Build.VERSION_CODES.R) which requires API 30+. Consider if the class-level annotation should be more restrictive or if runtime checks are needed.