mobile: IodineVpnServiceTest lifecycle coverage + ndkVersion 29

- IodineVpnServiceTest: action constants, extras, IodineTunnelBridge state, config sanitize, RemoteAccessMode iodine round-trips
- app/build.gradle: ndkVersion 29.0.14206865 (27 had corrupt empty dir)

Co-authored-by: Cursor <cursoragent@cursor.com>

app/build.gradle

@@ -56,6 +56,7 @@ try {
 android {
     namespace 'com.foxx.androidcast'
     compileSdk 34
+    ndkVersion '29.0.14206865'
 
     defaultConfig {
         applicationId "com.foxx.androidcast"

app/src/test/java/com/foxx/androidcast/remoteaccess/IodineVpnServiceTest.java

@@ -0,0 +1,89 @@
+package com.foxx.androidcast.remoteaccess;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/** Unit tests for IodineVpnService lifecycle helpers (no Android runtime required). */
+public class IodineVpnServiceTest {
+
+    @Test
+    public void actionConstants_areNonNull() {
+        assertNotNull(IodineVpnService.ACTION_UP);
+        assertNotNull(IodineVpnService.ACTION_DOWN);
+        assertTrue(IodineVpnService.ACTION_UP.contains("iodine"));
+        assertTrue(IodineVpnService.ACTION_DOWN.contains("iodine"));
+    }
+
+    @Test
+    public void extraConstants_areNonNull() {
+        assertNotNull(IodineVpnService.EXTRA_HOST);
+        assertNotNull(IodineVpnService.EXTRA_PORT);
+        assertNotNull(IodineVpnService.EXTRA_TUNNEL);
+        assertNotNull(IodineVpnService.EXTRA_PASSWORD);
+    }
+
+    @Test
+    public void actionUp_notEqualsDown() {
+        assertFalse(IodineVpnService.ACTION_UP.equals(IodineVpnService.ACTION_DOWN));
+    }
+
+    // IodineTunnelBridge state — no Android context needed
+
+    @Test
+    public void tunnelBridge_initiallyNotConnected() {
+        assertFalse(IodineTunnelBridge.isConnected());
+    }
+
+    @Test
+    public void tunnelBridge_lastDetailInitiallyEmpty() {
+        String detail = IodineTunnelBridge.getLastDetail();
+        assertNotNull(detail);
+    }
+
+    // IodineConfig integration
+
+    @Test
+    public void defaultUdpPort_matchesExpected() {
+        assertEquals(5350, IodineConfig.DEFAULT_UDP_PORT);
+    }
+
+    @Test
+    public void defaultPassword_isLabValue() {
+        assertEquals("zxc123", IodineConfig.DEFAULT_PASSWORD);
+    }
+
+    @Test
+    public void sanitize_roundTrip() {
+        assertEquals("fe.example.org", IodineConfig.sanitizeHost("  fe.example.org  "));
+        assertEquals(IodineConfig.DEFAULT_SERVER_HOST, IodineConfig.sanitizeHost(null));
+        assertEquals(IodineConfig.DEFAULT_SERVER_HOST, IodineConfig.sanitizeHost(""));
+        assertEquals(IodineConfig.DEFAULT_TUNNEL_DOMAIN, IodineConfig.sanitizeTunnelDomain(null));
+        assertEquals(5350, IodineConfig.sanitizePort(-1));
+        assertEquals(5350, IodineConfig.sanitizePort(99999));
+        assertEquals(443, IodineConfig.sanitizePort(443));
+    }
+
+    @Test
+    public void sanitizePassword_nullFallsBackToDefault() {
+        assertEquals(IodineConfig.DEFAULT_PASSWORD, IodineConfig.sanitizePassword(null));
+        assertEquals("custom", IodineConfig.sanitizePassword("custom"));
+    }
+
+    // RemoteAccessMode iodine integration
+
+    @Test
+    public void remoteAccessMode_iodineApiValue() {
+        assertEquals("iodine", RemoteAccessMode.IODINE.toApiValue());
+        assertTrue(RemoteAccessMode.IODINE.isActive());
+    }
+
+    @Test
+    public void remoteAccessMode_fromStored_iodine() {
+        assertEquals(RemoteAccessMode.IODINE, RemoteAccessMode.fromStored("iodine"));
+        assertEquals(RemoteAccessMode.IODINE, RemoteAccessMode.fromStored("IODINE"));
+    }
+}