Fix the crash of BandMode app.

It crashes because of out of array boundary exception. This app
predefined a list of constant strings of band mode. Unfortunately
the actual supported band modes keep adding and the hardcoded
list can meet.

Change-Id: Ife9683924706a1606d4f72b01a5904e9aa0f782c

src/com/android/settings/BandMode.java

@@ -73,8 +73,6 @@ public class BandMode extends Activity {
         mBandList.setAdapter(mBandListAdapter);
         mBandList.setOnItemClickListener(mBandSelectionHandler);
 
-
-
         loadBandList();
     }
 
@@ -109,6 +107,7 @@ public class BandMode extends Activity {
         }
 
         public String toString() {
+            if (mBandMode >= BAND_NAMES.length) return "Band mode " + mBandMode;
             return BAND_NAMES[mBandMode];
         }
     }