Add Windows JNI headers Only add the JNI headers from OpenJDK 21 Windows version. We don't build the JDK for Windows nor we support development from Windows but the JNI headers are useful for Kotlin multi-platform cross-compilation. The file where extracted from https://download.java.net/java/GA/jdk21.0.2/f2283984656d49d69e91c558476027ac/13/GPL/openjdk-21.0.2_windows-x64_bin.zip Bug: 335531615 Test: Verified windows-x86 is not removed after running update.sh Change-Id: Ia60158b8fa37f645386a33ef8cf1df38cd8eafe8