Support for newer Java versions

[danieljoconnor]

The Java version in the Pub/Sub API Java Examples is specified as version 11. Are newer versions of Java supported (specifically Java 19)? With Java's backwards compatibility, this may not be an issue but wanted to confirm to be sure.

https://github.com/forcedotcom/pub-sub-api/blob/main/java/pom.xml

<properties> <java.version>11</java.version> <maven.compiler.source>11</maven.compiler.source> <maven.compiler.target>11</maven.compiler.target> <avro.version>1.11.0</avro.version> <grpc.version>1.64.0</grpc.version> <protoc.version>3.25.3</protoc.version> <protocJava.version>1.64.0</protocJava.version> </properties>