cmake: create Android jars + apks for tests

test/android/cmake/SDLTestActivity.java.cmake

@@ -0,0 +1,33 @@
+package @ANDROID_MANIFEST_PACKAGE@;
+
+import org.libsdl.app.SDLActivity;
+
+import android.os.Bundle;
+import android.util.Log;
+
+public class SDLTestActivity extends SDLActivity {
+    private String[] m_arguments;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        m_arguments = getIntent().getStringArrayExtra("arguments");
+        if (m_arguments == null) {
+            m_arguments = new String[0];
+        }
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    protected String[] getLibraries() {
+        return new String[] { getString(R.string.lib_name) };
+    }
+
+    @Override
+    protected String[] getArguments() {
+        Log.v("SDLTest", "#arguments = " + m_arguments.length);
+        for(int i = 0; i < m_arguments.length; i++) {
+            Log.v("SDLTest", "argument[" + i + "] = " + m_arguments[i]);
+        }
+        return m_arguments;
+    }
+}