Add environment variables for Java 18 and 19 Java home

gradle.properties

@@ -16,4 +16,4 @@ systemProp.jdk.tls.client.protocols=TLSv1.2
 
 # java homes resolved by environment variables
 org.gradle.java.installations.auto-detect=false
-org.gradle.java.installations.fromEnv=JAVA_HOME,RUNTIME_JAVA_HOME,JAVA17_HOME,JAVA16_HOME,JAVA15_HOME,JAVA14_HOME,JAVA13_HOME,JAVA12_HOME,JAVA11_HOME,JAVA8_HOME
+org.gradle.java.installations.fromEnv=JAVA_HOME,RUNTIME_JAVA_HOME,JAVA19_HOME,JAVA18_HOME,JAVA17_HOME,JAVA16_HOME,JAVA15_HOME,JAVA14_HOME,JAVA13_HOME,JAVA12_HOME,JAVA11_HOME,JAVA8_HOME