[rilmodem] Release parcel after message sending

Parcel needs to be released after message sending. Otherwise
there is a minor memory leak.

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
[rilmodem] When sim stays on in offline mode PIN cache can be emptied

After modem is configured to keep SIM alive in offline mode PIN
cache can and should be tied to SIM presence notification. Note:
inserting this fix before modem configuration change will
effectively break PIN caching part of the hidden reset.

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
[ofono] Make DTMF sending via rilmodem more robust

Loop DTMF requests via core, not via driver. Drop unused variables.

Signed-off-by: Martti Piirainen <martti.piirainen@oss.tieto.com>
[rilmodem] Set technology preference values to match recent RIL changes
[rilmodem] unregister unsolicited message

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
[rilmodem] fix group queue cleanup

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>
[rilmodem] Check the ratmode and force it to be as configured

After flashing default rat mode might be different than configured. If
so, it needs to be set.

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
[gdbus] Fix crash when disconnecting from D-Bus

Upstream commit:

From b4b4b35d0beac7340aed6da979f043dd1424a631 Mon Sep 17 00:00:00 2001
From: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Date: Mon, 9 Sep 2013 11:25:12 +0300
Subject: [PATCH 01/25] gdbus/watch: Fix crash when disconnecting from D-Bus

When disconnecting from D-Bus a message could be recieved with no sender:
Invalid read of size 1
   at 0x4A09EE1: strcmp (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
   by 0x3B03C386B8: g_str_equal (in /usr/lib64/libglib-2.0.so.0.3600.3)
   by 0x4065D6: message_filter (watch.c:529)
   by 0x3B0700F9E5: dbus_connection_dispatch (in /usr/lib64/libdbus-1.so.3.7.4)
   by 0x4052E7: message_dispatch (mainloop.c:76)
   by 0x3B03C48962: ??? (in /usr/lib64/libglib-2.0.so.0.3600.3)
   by 0x3B03C47E05: g_main_context_dispatch (in /usr/lib64/libglib-2.0.so.0.3600.3)
   by 0x3B03C48157: ??? (in /usr/lib64/libglib-2.0.so.0.3600.3)
   by 0x3B03C48559: g_main_loop_run (in /usr/lib64/libglib-2.0.so.0.3600.3)
   by 0x4038C5: client_proxy_removed (test-gdbus-client.c:902)
   by 0x3B03C6B566: ??? (in /usr/lib64/libglib-2.0.so.0.3600.3)
   by 0x3B03C6B6E5: ??? (in /usr/lib64/libglib-2.0.so.0.3600.3)
 Address 0x0 is not stack'd, malloc'd or (recently) free'd