Optimize java JVM with full LTO for OpenJDK 21 Full LTO is enabled in OpenJDK 17. Now we enable it for OpenJDK 21. Bug: b/228432840 Test: add -flto flag and then update prebuilt in android internal and test build time Change-Id: Ief7caf6b1705aeded4e68d7398e23239e2a57f61