PowerShareTile: Mark is unavailable if enabled state can't be read

    @Override

    public boolean isAvailable() {

        return mPowerShare != null;

        try {

            // Will throw NPE or some other exception if HAL is either missing or broken.

            mPowerShare.isEnabled();

            return true;

        } catch (Exception ex) {

            return false;

        }

    }

    @Override