Unhide wifi p2p API

CleanSpec.mk

api/current.txt

core/java/android/content/Context.java

services/java/com/android/server/WifiService.java

wifi/java/android/net/wifi/IWifiManager.aidl

wifi/java/android/net/wifi/WifiConfigStore.java

wifi/java/android/net/wifi/WifiManager.java

wifi/java/android/net/wifi/WifiNative.java

wifi/java/android/net/wifi/WifiStateMachine.java

wifi/java/android/net/wifi/WpsInfo.aidl

wifi/java/android/net/wifi/WpsInfo.java

wifi/java/android/net/wifi/WpsStateMachine.java

wifi/java/android/net/wifi/p2p/WifiP2pConfig.java

wifi/java/android/net/wifi/p2p/WifiP2pDevice.java

wifi/java/android/net/wifi/p2p/WifiP2pDeviceList.java

wifi/java/android/net/wifi/p2p/WifiP2pGroup.java

wifi/java/android/net/wifi/p2p/WifiP2pInfo.java

wifi/java/android/net/wifi/p2p/WifiP2pManager.java

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