pyportaltest: Disable the timeouts for the session closed signal test

If our test machine is under load let's keep waiting a bit longer for
the signal to arrive.

Closes #166

tests/pyportaltest/test_inputcapture.py

@@ -618,7 +618,7 @@ def method_called(method_name, method_args, path):
         )
 
         xdp_session.close()
-        self.mainloop.run()
+        self.setup_mainloop_with_timeout(timeout_ms=0).run()
 
         assert was_closed is True
 
@@ -642,6 +642,6 @@ def session_closed(session):
         xdp_session.connect("closed", session_closed)
 
         session.enable()
-        self.mainloop.run()
+        self.setup_mainloop_with_timeout(timeout_ms=0).run()
 
         assert session_closed_signal_received is True

tests/pyportaltest/test_remotedesktop.py

@@ -571,7 +571,7 @@ def method_called(method_name, method_args, path):
         )
 
         session.close()
-        self.mainloop.run()
+        self.setup_mainloop_with_timeout(timeout_ms=0).run()
 
         assert was_closed is True
 
@@ -593,6 +593,6 @@ def session_closed(session):
 
         session.connect("closed", session_closed)
 
-        self.mainloop.run()
+        self.setup_mainloop_with_timeout(timeout_ms=0).run()
 
         assert session_closed_signal_received is True

tests/pyportaltest/test_screencast.py

@@ -307,5 +307,5 @@ def method_called(method_name, method_args, path):
         )
 
         session.close()
-        self.mainloop.run()
+        self.setup_mainloop_with_timeout(timeout_ms=0).run()
         assert was_closed is True