Containerize CI and Fix Android Build Issues

Updated CI workflows to use a unified Docker container with pre-installed dependencies. Addressed build failures related to Android SDK tools requiring newer Java versions and fixed Maven plugin dependencies.

- **CI Containerization:**
    - Created `.ci/container/Dockerfile` based on Ubuntu 24.04 with OpenJDK 8-25, Android SDK, Ant, Maven, and Python.
    - Updated `pr.yml`, `ant.yml`, `scripts-android.yml`, and `parparvm-tests.yml` to run inside the container.
    - Added `build-container.yml` workflow to build and push the container image.

- **Fix Android Build:**
    - Modified `AndroidGradleBuilder.java` to set `JAVA_HOME` to Java 17/11 (if available) for spawned processes, ensuring `sdkmanager` runs correctly.
    - Updated `scripts/run-android-instrumentation-tests.sh` to explicitly use `JAVA17_HOME` for `sdkmanager`.
    - Improved `AndroidGradleBuilder` SDK path detection to support standard paths like `/opt/android-sdk`.

- **Fix Maven Plugin:**
    - Added `xalan` and `serializer` dependencies to `maven/codenameone-maven-plugin/pom.xml` to resolve `NoClassDefFoundError` during CSS compilation.

- **Encoding Fixes:**
    - Enforced UTF-8 encoding in `Ports/Android/build.xml` and fixed a non-ASCII character in source code.

Author: google-labs-jules[bot]

maven/codenameone-maven-plugin/pom.xml

@@ -219,6 +219,16 @@
             <artifactId>maven-model</artifactId>
 
         </dependency>
+        <dependency>
+            <groupId>xalan</groupId>
+            <artifactId>xalan</artifactId>
+            <version>2.7.3</version>
+        </dependency>
+        <dependency>
+            <groupId>xalan</groupId>
+            <artifactId>serializer</artifactId>
+            <version>2.7.3</version>
+        </dependency>
     </dependencies>
 
     <build>

maven/codenameone-maven-plugin/src/main/java/com/codename1/builders/AndroidGradleBuilder.java

@@ -499,6 +499,23 @@ private static String escape(String str, String chars) {
 
     @Override
     public boolean build(File sourceZip, final BuildRequest request) throws BuildException {
+        // Ensure that we use a java version that is compatible with the android sdk tools
+        // We prefer Java 17, but will fall back to others if not found.
+        String javaHome = System.getenv("JAVA17_HOME");
+        if (javaHome == null) {
+            javaHome = System.getenv("JDK17_HOME");
+        }
+        if (javaHome == null) {
+            javaHome = System.getenv("JAVA11_HOME");
+        }
+        if (javaHome == null) {
+            javaHome = System.getenv("JDK11_HOME");
+        }
+
+        if (javaHome != null) {
+            defaultEnvironment.put("JAVA_HOME", javaHome);
+        }
+
         boolean facebookSupported = request.getArg("facebook.appId", null) != null;
         newFirebaseMessaging = request.getArg("android.newFirebaseMessaging", "true").equals("true");
         useGradle8 = request.getArg("android.useGradle8", ""+(useGradle8 || newFirebaseMessaging || facebookSupported)).equals("true");

scripts/run-android-instrumentation-tests.sh

@@ -70,6 +70,17 @@ cn1ss_setup "$TARGET_JAVA_BIN" "$CN1SS_HELPER_SOURCE_DIR"
 [ -x "$GRADLE_PROJECT_DIR/gradlew" ] || chmod +x "$GRADLE_PROJECT_DIR/gradlew"
 
 # ---- Prepare app + emulator state -----------------------------------------
+# Check for JAVA17_HOME or JDK17_HOME to run sdkmanager with a compatible JDK
+SDKMANAGER_JAVA_HOME=$JAVA_HOME
+if [ -n "${JAVA17_HOME:-}" ]; then
+    SDKMANAGER_JAVA_HOME=$JAVA17_HOME
+elif [ -n "${JDK17_HOME:-}" ]; then
+    SDKMANAGER_JAVA_HOME=$JDK17_HOME
+fi
+
+# Ensure licenses are accepted
+yes | JAVA_HOME="$SDKMANAGER_JAVA_HOME" sdkmanager --licenses > /dev/null
+
 MANIFEST="$GRADLE_PROJECT_DIR/app/src/main/AndroidManifest.xml"
 if [ ! -f "$MANIFEST" ]; then
   ra_log "FATAL: AndroidManifest.xml not found at $MANIFEST" >&2