Fix Quick Fix tests that used AnalysisContext.

pkg/analysis_server/test/abstract_context.dart

Index: pkg/analysis_server/test/abstract_context.dart
diff --git a/pkg/analysis_server/test/abstract_context.dart b/pkg/analysis_server/test/abstract_context.dart
index ed9bb2f48e18b7a6f1d132e62a6a39cb9f61cd49..6d804be1d7b261a41783d9217e617d66e1736fd9 100644
--- a/pkg/analysis_server/test/abstract_context.dart
+++ b/pkg/analysis_server/test/abstract_context.dart
@@ -113,6 +113,9 @@ class AbstractContextTest {
    * Performs all analysis tasks in [context].
    */
   void performAllAnalysisTasks() {
+    if (enableNewAnalysisDriver) {
+      return;
+    }
     while (true) {
       engine.AnalysisResult result = context.performAnalysisTask();
       if (!result.hasMoreWork) {