Wifi: Allow configuration of the P2P ifname

ICS used the same wifi.interface as the regular wifi service.
Let's use wifi.p2pinterface here, since they _can_ be different

Conflicts:
	wifi/java/android/net/wifi/p2p/WifiP2pService.java

Change-Id: Iab68b245b33377271354c849bbe33725a26193f1
SystemUI: Fix screenshot animation not showing the picture properly

When taking the screenshot,the drop-in animation looks completely like a mess.
This patch fixes the problem and now the taken picture should be displayed
properly.

Change-Id: Iddb72e58a236d6a96048608ee140ce262053d5d2