change class modifier for javadocs

Author: siddhijain

msal4j-brokers/src/main/java/com/microsoft/aad/msal4jbrokers/MSALRuntimeBroker.java

@@ -6,7 +6,7 @@
 import java.util.concurrent.CompletableFuture;
 
 @Slf4j
-class MSALRuntimeBroker implements IBroker {
+public class MSALRuntimeBroker implements IBroker {
 
     @Override
     public IAuthenticationResult acquireToken(PublicClientApplication application, SilentParameters requestParameters) {