Update Java SDK and add aws-java-sdk-sts library inside jar

Hi,

Currently we are implementing the AWS X-Ray auto-instrumentation agent for Java for a Spring project inside EKS, but we had problems executing the spring microservices for two reasons:

- The version of the sdk we are using is more recent than the java agent (1.11.909)
- In the EKS, the pods are using serviceaccount to call aws resources, for this, the java agent needs to have the aws-java-sdk-sts library in its classpath.

We hope you can update the aws-xray-java-agent with those changes :)

Thanks!