notify: Make GObject property change notifications thread safe
notify: Make GObject property change notifications thread safe

Adds locking around object property change notification handling. The
notifications are only emitted after all threads have called
g_object_thaw_notify().

https://bugzilla.gnome.org/show_bug.cgi?id=166020

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