Fix force L3 preference unit test

    @Test

    @EnableFlags(Flags.FLAG_FORCE_L3_ENABLED)

    public void updateState_flagEnabled_checkPreference() {

        try (MediaDrm drm = new MediaDrm(WIDEVINE_UUID)) {

            mController.updateState(mPreference);

        } catch (UnsupportedSchemeException ex) {

            assumeNoException(ex);

        }

        assertThat(mPreference.isEnabled()).isTrue();

        assertThat(mPreference.isChecked()).isFalse();

        assertThat(WidevineProperties.forcel3_enabled().orElse(false)).isFalse();