Frameworks: fix living wallpaper exception when reboot

If living wallpaper is set, device shows static wallpaper
for a moment after boot up then switches to living wallpaper.
Bind service for getting wallpaper data will not success
first time after reboot if the wallpaper isn't direct-boot
aware,for getting the desired data requires the second
parameter of bind method equals "MATCH_DIRECT_BOOT_UNAWARE",
then rebind the service,and it shouldn't set first display
as last setted static wallpaper before getting the desired
data.

As long as the boot time is set to show the living wallpaper
first even if the wallpaper data is still in loading,it's
better than show the static wallpaer first which would lead
to the phenomenon of flash.

Change-Id: Id3a75d44e25ee8744e0551bae046876880909650
CRs-Fixed: 1056697