Merge "wfd: release wifi p2p resource on disconnecting from WFD service." into sc-dev am: 492a8e6cfe

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14948153

Change-Id: If9176f169580e66b84667b6f225a5fb89a796987

services/core/java/com/android/server/display/WifiDisplayController.java

@@ -550,6 +550,11 @@ final class WifiDisplayController implements DumpUtils.Dump {
 
     private void disconnect() {
         mDesiredDevice = null;
+        mWifiP2pManager = null;
+        if (null != mWifiP2pChannel) {
+            mWifiP2pChannel.close();
+            mWifiP2pChannel = null;
+        }
         updateConnection();
     }