style(llmobs): apply spotless formatting to agent attribution files

Remove trailing blank lines flagged by google-java-format:
- DDLLMObsSpan.java: blank line inside constructor body before closing brace
- DDLLMObsSpanAgentAttributionTest.java: blank line before class closing brace

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: yahya-mouman

dd-java-agent/agent-llmobs/src/main/java/datadog/trace/llmobs/domain/DDLLMObsSpan.java

@@ -170,7 +170,6 @@ public DDLLMObsSpan(
     scope =
         LLMObsContext.attach(
             span.spanContext(), sessionId, resolvedParentAgentSpanId, resolvedParentAgentName);
-
   }
 
   /**

dd-java-agent/agent-llmobs/src/test/java/datadog/trace/llmobs/domain/DDLLMObsSpanAgentAttributionTest.java

@@ -279,5 +279,4 @@ void staleContextInDifferentTraceDoesNotInheritPagent() throws Exception {
       firstRoot.finish();
     }
   }
-
 }