AI 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/...

Automated import of CL 143788

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

@@ -575,8 +575,9 @@ public class LocalBluetoothDevice implements Comparable<LocalBluetoothDevice> {
      */
     private void fetchBtClass() {
         mBtClass = mLocalManager.getBluetoothManager().getRemoteClass(mAddress);
-        mProfiles.clear();
-        LocalBluetoothProfileManager.fill(mBtClass, mProfiles);
+        if (mBtClass != BluetoothClass.ERROR) {
+            LocalBluetoothProfileManager.fill(mBtClass, mProfiles);
+        }
     }
 
     /**