GSimpleAction: tweak property flags
GSimpleAction: tweak property flags

There's no need for 'enabled' and 'state' to be marked construct-only.
These properties are writable at all times.

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