Merge "Remove mini-keyctl usage from UpdatableSystemFontTest" into main

    private static final Pattern PATTERN_SYSTEM_FONT_FILES =

            Pattern.compile("^/(system|product)/fonts/");

    private String mKeyId;

    private FontManager mFontManager;

    private UiDevice mUiDevice;

    @Before

    public void setUp() throws Exception {

        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();

        mKeyId = insertCert(CERT_PATH);

        insertCert(CERT_PATH);

        mFontManager = context.getSystemService(FontManager.class);

        expectCommandToSucceed("cmd font clear");

        mUiDevice = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());

    public void tearDown() throws Exception {

        // Ignore errors because this may fail if updatable system font is not enabled.

        runShellCommand("cmd font clear", null);

        if (mKeyId != null) {

            expectCommandToSucceed("mini-keyctl unlink " + mKeyId + " .fs-verity");

        }

    }

    @Test

        assertThat(isFileOpenedBy(fontPath, EMOJI_RENDERING_TEST_APP_ID)).isFalse();

    }

    private static String insertCert(String certPath) throws Exception {

        Pair<String, String> result;

        try (InputStream is = new FileInputStream(certPath)) {

            result = runShellCommand("mini-keyctl padd asymmetric fsv_test .fs-verity", is);

        }

    private static void insertCert(String certPath) throws Exception {

        // /data/local/tmp is not readable by system server. Copy a cert file to /data/fonts

        final String copiedCert = "/data/fonts/debug_cert.der";

        runShellCommand("cp " + certPath + " " + copiedCert, null);

        runShellCommand("cmd font install-debug-cert " + copiedCert, null);

        // Assert that there are no errors.

        assertThat(result.second).isEmpty();

        String keyId = result.first.trim();

        assertThat(keyId).matches("^\\d+$");

        return keyId;

    }

    private int updateFontFile(String fontPath, String signaturePath) throws IOException {