Refactor to use FlowState

Remove the auxiliary DataFlow configuration

java/ql/test/query-tests/security/CWE-927/ImplicitPendingIntentsTest.java

@@ -98,6 +98,12 @@ public class ImplicitPendingIntentsTest {
             ctx.startActivity(fwdIntent); // $hasImplicitPendingIntent
         }
 
+        {
+            Intent intent = new Intent();
+            // Testing the need of going through a PendingIntent creation (flow state)
+            ctx.startActivity(intent); // Safe
+        }
+
         {
             Intent safeIntent = new Intent(ctx, Activity.class); // Sanitizer
             PendingIntent pi = PendingIntent.getActivity(ctx, 0, safeIntent, 0);