Fix invalid memory access in root canal.

The aysnc sockets depend on the async manager. We now make sure we do
not delete the async_manager_ before all the sockets have been
deleted.

This caused crashes and hangs in the emulator.

Test: gd/cert/run
Bug: 197160153
Change-Id: I692ed0d183c9dec84a6280de0450c1f3f74b0b13

system/vendor_libs/test_vendor_lib/desktop/test_environment.h

@@ -64,6 +64,7 @@ class TestEnvironment {
   void close();
 
  private:
+  test_vendor_lib::AsyncManager async_manager_;
   std::shared_ptr<AsyncDataChannelServer> test_socket_server_;
   std::shared_ptr<AsyncDataChannelServer> hci_socket_server_;
   std::shared_ptr<AsyncDataChannelServer> link_socket_server_;
@@ -72,7 +73,6 @@ class TestEnvironment {
   bool test_channel_open_{false};
   std::promise<void> barrier_;
 
-  test_vendor_lib::AsyncManager async_manager_;
 
   void SetUpTestChannel();
   void SetUpHciServer(ConnectCallback on_connect);