Disable unused CallKit buttons.

// FREEBIE

Signal/src/call/Speakerbox/CallKitCallUIAdaptee.swift

@@ -30,6 +30,8 @@ final class CallKitCallUIAdaptee: NSObject, CallUIAdaptee, CXProviderDelegate {
 
         providerConfiguration.supportsVideo = true
 
+        providerConfiguration.maximumCallGroups = 1
+        
         providerConfiguration.maximumCallsPerCallGroup = 1
 
         providerConfiguration.supportedHandleTypes = [.phoneNumber]
@@ -68,7 +70,11 @@ final class CallKitCallUIAdaptee: NSObject, CallUIAdaptee, CXProviderDelegate {
         let update = CXCallUpdate()
         update.remoteHandle = CXHandle(type: .phoneNumber, value: call.remotePhoneNumber)
         update.hasVideo = call.hasVideo
-
+        update.supportsHolding = false
+        update.supportsGrouping = false
+        update.supportsUngrouping = false
+        update.supportsDTMF = false
+        
         // Report the incoming call to the system
         provider.reportNewIncomingCall(with: call.localId, update: update) { error in
             /*

Signal/src/view controllers/CallViewController.swift

@@ -647,8 +647,8 @@ class CallViewController: UIViewController, CallDelegate {
 
     internal func stateDidChange(call: SignalCall, state: CallState) {
         DispatchQueue.main.async {
+            Logger.info("\(self.TAG) new call status: \(state)")
             self.updateCallUI(callState: state)
-            Logger.info("\(self.TAG) new call status: \(call.state)")
         }
         self.audioService.handleState(state)
     }