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

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base