Enable networks on screen on

We now all configured networks on screen on.
Also, removed event logging for scanning and rssi polling

Bug: 2129037
Change-Id: I995893d77f8575a8d987d9d8604c8272f636d12d

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

@@ -877,6 +877,7 @@ public class WifiService extends IWifiManager.Stub {
                 // because of any locks so clear that tracking immediately.
                 reportStartWorkSource();
                 mWifiStateMachine.enableRssiPolling(true);
+                mWifiStateMachine.enableAllNetworks();
                 updateWifiState();
             } else if (action.equals(Intent.ACTION_SCREEN_OFF)) {
                 if (DBG) {