Remove mini-keyctl usage from UpdatableSystemFontTest

Bug: 313005703
Test: atest UpdatableFontDirTest UpdatableSystemFontTest
Test: atest GtsFontHostTestCases FontManagerTest
Change-Id: Ib4a32a9bbb27ebd2e9a32dc308f79ec1c91332ce

tests/UpdatableSystemFontTest/src/com/android/updatablesystemfont/UpdatableSystemFontTest.java

@@ -130,14 +130,13 @@ public class UpdatableSystemFontTest {
     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());
@@ -147,9 +146,6 @@ public class UpdatableSystemFontTest {
     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
@@ -369,20 +365,11 @@ public class UpdatableSystemFontTest {
         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 {