Remove the prefix "Model:" from the summary of hardware.

Fixes: 159529327
Test: run robotest and observe the UI
Change-Id: I60f4a341b427e4b619a202a440f3f2554c562a27

src/com/android/settings/deviceinfo/HardwareInfoPreferenceController.java

@@ -49,7 +49,7 @@ public class HardwareInfoPreferenceController extends BasePreferenceController {
 
     @Override
     public CharSequence getSummary() {
-        return mContext.getResources().getString(R.string.model_summary, getDeviceModel());
+        return getDeviceModel();
     }
 
     public static String getDeviceModel() {