Make getScopes in the ARM Authentication Policy Public (Azure#22120)

Make getScopes in the ARM Authentication Policy Public

Author: alzimmermsft

sdk/core/azure-core-management/src/main/java/com/azure/core/management/http/policy/ArmChallengeAuthenticationPolicy.java

@@ -9,6 +9,7 @@
 import com.azure.core.http.HttpResponse;
 import com.azure.core.http.policy.BearerTokenAuthenticationPolicy;
 import com.azure.core.management.implementation.http.AuthenticationChallenge;
+import com.azure.core.util.CoreUtils;
 import reactor.core.publisher.Mono;
 
 import java.nio.charset.StandardCharsets;
@@ -98,8 +99,15 @@ public Mono<Boolean> authorizeRequestOnChallenge(HttpPipelineCallContext context
         });
     }
 
-    protected String[] getScopes(HttpPipelineCallContext context, String[] scopes) {
-        return scopes;
+    /**
+     * Gets the scopes for the specific request.
+     *
+     * @param context The request.
+     * @param scopes Default scopes used by the policy.
+     * @return The scopes for the specific request.
+     */
+    public String[] getScopes(HttpPipelineCallContext context, String[] scopes) {
+        return CoreUtils.clone(scopes);
     }
 
     List<AuthenticationChallenge> parseChallenges(String header) {

sdk/resourcemanager/azure-resourcemanager-resources/src/main/java/com/azure/resourcemanager/resources/fluentcore/policy/AuthenticationPolicy.java

@@ -30,7 +30,7 @@ public AuthenticationPolicy(TokenCredential credential, AzureEnvironment environ
     }
 
     @Override
-    protected String[] getScopes(HttpPipelineCallContext context, String[] scopes) {
+    public String[] getScopes(HttpPipelineCallContext context, String[] scopes) {
         if (CoreUtils.isNullOrEmpty(scopes)) {
             scopes = new String[1];
             scopes[0] = ResourceManagerUtils.getDefaultScopeFromRequest(context.getHttpRequest(), environment);