AI 143812: am: CL 143788 am: CL 143740 Don't clear supported profiles in settings app if getRemoteClass returns error.

Also clean up the error codes returned by the framework, so that the settings app can properly detect an error.
  Original author: npelly
  Merged from: //branches/cupcake/...
  Original author: android-build
  Merged from: //branches/donutburger/...

Automated import of CL 143812

src/com/android/settings/bluetooth/LocalBluetoothDevice.java

@@ -575,9 +575,10 @@ public class LocalBluetoothDevice implements Comparable<LocalBluetoothDevice> {
      */
     private void fetchBtClass() {
         mBtClass = mLocalManager.getBluetoothManager().getRemoteClass(mAddress);
-        mProfiles.clear();
+        if (mBtClass != BluetoothClass.ERROR) {
             LocalBluetoothProfileManager.fill(mBtClass, mProfiles);
         }
+    }
 
     /**
      * Refreshes the UI for the BT class, including fetching the latest value