enable an event into rtcaudio session

this enables M75 of ios WebRTC SDK to start/stop audio session

Author: danjenkins

ios/RNCallKeep/RNCallKeep.m

@@ -573,6 +573,13 @@ - (void)provider:(CXProvider *)provider didActivateAudioSession:(AVAudioSession
 #ifdef DEBUG
     NSLog(@"[RNCallKeep][CXProviderDelegate][provider:didActivateAudioSession]");
 #endif
+    NSDictionary *userInfo
+        = @{
+            AVAudioSessionInterruptionTypeKey: [NSNumber numberWithInt:AVAudioSessionInterruptionTypeEnded],
+            AVAudioSessionInterruptionOptionKey: [NSNumber numberWithInt:AVAudioSessionInterruptionOptionShouldResume]
+            };
+    [[NSNotificationCenter defaultCenter] postNotificationName:AVAudioSessionInterruptionNotification object:nil userInfo:userInfo];
+
     [self configureAudioSession];
     [self sendEventWithName:RNCallKeepDidActivateAudioSession body:nil];
 }