Fix the build with rmw_fastrtps_dynamic. (#1416)

When building with *only* rmw_fastrtps_dynamic, there is
no test named "test_play_services__rmw_fastrtps_cpp" to
mark as xfail.  Instead, it is called
"test_play_services__rmw_fastrtps_dynamic_cpp", so make
sure to add a different xfail marking for that test.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>

rosbag2_transport/CMakeLists.txt

@@ -242,9 +242,12 @@ function(create_tests_for_rmw_implementation)
     ament_add_test_label(test_play_services__rmw_cyclonedds_cpp xfail)
   endif()
 
-  if(${rmw_implementation} MATCHES "rmw_fastrtps(.*)")
+  if(${rmw_implementation} MATCHES "rmw_fastrtps_cpp")
     ament_add_test_label(test_play_services__rmw_fastrtps_cpp xfail)
   endif()
+  if(${rmw_implementation} MATCHES "rmw_fastrtps_dynamic_cpp")
+    ament_add_test_label(test_play_services__rmw_fastrtps_dynamic_cpp xfail)
+  endif()
 endfunction()
 
 if(BUILD_TESTING)