* Private method to initiate clearing user data when the user clicks the clear data
     * button for a system package
     */
    private  void initiateClearUserData() {
        mClearDataButton.setEnabled(false);
        // Invoke uninstall or clear user data based on sysPackage
        String packageName = mAppEntry.info.packageName;
        Log.i(TAG, "Clearing user data for package : " + packageName);
        if (mClearDataObserver == null) {
            mClearDataObserver = new ClearUserDataObserver();
        }
        ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        boolean res = am.clearApplicationUserData(packageName, mClearDataObserver);
        if (!res) {
            // Clearing data failed for some obscure reason. Just log error for now
            Log.i(TAG, "Couldnt clear application user data for package:"+packageName);
            showDialogInner(DLG_CANNOT_CLEAR_DATA);
        } else {
            mClearDataButton.setText(R.string.recompute_size);
        }
    }