frameworks/base: stop find before issuing wps pbc.

Stop p2p find before issuing a PBC to avoid GO switching to other
channel leading connection failure.

Change-Id: I88906f944de1c85b143f96cb7b35724af19cd151
Signed-off-by: Deepthi Gowri <deepthi@codeaurora.org>

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

@@ -1731,6 +1731,8 @@ public class WifiP2pService extends IWifiP2pManager.Stub {
                     //Ignore more client requests
                     break;
                 case PEER_CONNECTION_USER_ACCEPT:
+                    //Stop discovery to avoid failure due to channel switch
+                    mWifiNative.p2pStopFind();
                     if (mSavedPeerConfig.wps.setup == WpsInfo.PBC) {
                         mWifiNative.startWpsPbc(mGroup.getInterface(), null);
                     } else {