Fixing line in Market IAB docs that explains how to bind to the

MarketService.

We use the IMarketBillingService, which is incorrect. It should be
"com.android.vending.billing.MarketBillingService.BIND".

Change-Id: Ie361e58cea8aca6d70bd48bce062ca8d062281ee

Author: tjohns

docs/html/guide/market/billing/billing_integrate.jd

@@ -223,7 +223,7 @@ Billing package contains the sample application and the AIDL file. </div>
 <pre>
 try {
   boolean bindResult = mContext.bindService(
-    new Intent(IMarketBillingService.class.getName()), this, Context.BIND_AUTO_CREATE);
+    new Intent("com.android.vending.billing.MarketBillingService.BIND"), this, Context.BIND_AUTO_CREATE);
   if (bindResult) {
     Log.i(TAG, "Service bind successful.");
   } else {