Fix priority inversion issue exposed by Xcode 14 (#10144)

Author: paulb777

FirebaseDatabase/CHANGELOG.md

@@ -1,3 +1,6 @@
+# 9.6.0
+- [fixed] Fix priority inversion issue exposed by Xcode 14. (#10130)
+
 # 9.3.0
 - [fixed] Fix `reference(withPath:)` race condition crash. (#7885)
 

FirebaseDatabase/Sources/third_party/SocketRocket/FSRWebSocket.m

@@ -1799,6 +1799,7 @@ + (NSRunLoop *)FSR_networkRunLoop {
     dispatch_once(&onceToken, ^{
         networkThread = [[_FSRRunLoopThread alloc] init];
         networkThread.name = @"com.squareup.SocketRocket.NetworkThread";
+        networkThread.qualityOfService = NSQualityOfServiceUserInitiated;
         [networkThread start];
         networkRunLoop = networkThread.runLoop;
     });