GSettingsBackend: emit changes to correct thread
GSettingsBackend: emit changes to correct thread

When g_settings_apply() is called on a delayed settings backend and
there is a D-Bus error when communicating with dconf-service, recent
versions of the dconf GSettingsBackend call a function in GLib that
improperly delivered the signal directly instead of using
g_main_context_invoke().

This patch fixes this function to route in the same way as the others so
that the signal is dispatched in the proper GMainContext.

cention-sany/glib,mzabaluev/glib,gale320/glib,bluez-android/glib,pstglia/platform-external-bluetooth-glib,johne53/MB3Glib,johne53/MB3Glib,krichter722/glib,bluez-android/glib,antono/glib,MathieuDuponchelle/glib,krichter722/glib,01org/android-bluez-glib,01org/android-bluez-glib,darren-clark/android_platform_external_bluetooth_glib,tamaskenez/glib,darren-clark/android_platform_external_bluetooth_glib,iConsole/Console-OS_external_bluetooth_glib,iConsole/Console-OS_external_bluetooth_glib,tchakabam/glib,tamaskenez/glib,lukasz-skalski/glib,gale320/glib,MathieuDuponchelle/glib,cention-sany/glib,ieei/glib,ieei/glib,iConsole/Console-OS_external_bluetooth_glib,krichter722/glib,justinkb/aosp-bluez.glib,gale320/glib,cosimoc/glib,cention-sany/glib,pstglia/external-bluetooth-glib,tamaskenez/glib,bluez-android/glib,MathieuDuponchelle/glib,darren-clark/android_platform_external_bluetooth_glib,antono/glib,pstglia/external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,gale320/glib,djdeath/glib,endlessm/glib,krichter722/glib,Distrotech/glib,lukasz-skalski/glib,gale320/glib,justinkb/aosp-bluez.glib,johne53/MB3Glib,pstglia/external-bluetooth-glib,endlessm/glib,cosimoc/glib,01org/android-bluez-glib,endlessm/glib,endlessm/glib,bluez-android/glib,lukasz-skalski/glib,ieei/glib,cosimoc/glib,tchakabam/glib,pstglia/platform-external-bluetooth-glib,ieei/glib,cention-sany/glib,01org/android-bluez-glib,darren-clark/android_platform_external_bluetooth_glib,Distrotech/glib,lukasz-skalski/glib,pstglia/external-bluetooth-glib,tchakabam/glib,lukasz-skalski/glib,johne53/MB3Glib,antono/glib,ieei/glib,pstglia/platform-external-bluetooth-glib,MathieuDuponchelle/glib,Distrotech/glib,MathieuDuponchelle/glib,cosimoc/glib,justinkb/aosp-bluez.glib,johne53/MB3Glib,cention-sany/glib,djdeath/glib,krichter722/glib,Distrotech/glib,djdeath/glib,mzabaluev/glib,darren-clark/android_platform_external_bluetooth_glib,tchakabam/glib,mzabaluev/glib,pstglia/platform-external-bluetooth-glib,endlessm/glib,bluez-android/glib,Distrotech/glib,tamaskenez/glib,tamaskenez/glib,djdeath/glib,justinkb/aosp-bluez.glib,justinkb/aosp-bluez.glib,mzabaluev/glib,mzabaluev/glib,johne53/MB3Glib,01org/android-bluez-glib,antono/glib,pstglia/external-bluetooth-glib,djdeath/glib,tchakabam/glib,cosimoc/glib,pstglia/platform-external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib