[Impeller] move aiks text tests to DL.

ci/licenses_golden/excluded_files

@@ -149,6 +149,7 @@
 ../../../flutter/impeller/display_list/aiks_dl_opacity_unittests.cc
 ../../../flutter/impeller/display_list/aiks_dl_path_unittests.cc
 ../../../flutter/impeller/display_list/aiks_dl_runtime_effect_unittests.cc
+../../../flutter/impeller/display_list/aiks_dl_text_unittests.cc
 ../../../flutter/impeller/display_list/aiks_dl_unittests.cc
 ../../../flutter/impeller/display_list/aiks_dl_vertices_unittests.cc
 ../../../flutter/impeller/display_list/dl_golden_blur_unittests.cc

display_list/dl_color.h

@@ -56,6 +56,8 @@ struct DlColor {
   static constexpr DlColor kMaroon()             {return DlColor(0xFF800000);};
   static constexpr DlColor kSkyBlue()            {return DlColor(0xFF87CEEB);};
   static constexpr DlColor kCornflowerBlue()     {return DlColor(0xFF6495ED);};
+  static constexpr DlColor kCrimson()            {return DlColor(0xFFFF5733);};
+  static constexpr DlColor kAqua()               {return DlColor(0xFF00FFFF);};
   // clang-format on
 
   constexpr bool isOpaque() const { return getAlpha() == 0xFF; }