Build skia with expat (#42859)

Skia codecs depends on Skia's xml libraries which depend on expat, so we
must enable expat for non-wasm builds.

See #42857 for an example of a
failing build on Skia.

Author: Harry Terkelsen

tools/gn

@@ -300,7 +300,7 @@ def to_gn_args(args):
   gn_args['skia_use_x11'
          ] = False  # Never add the X11 dependency (only takes effect on Linux).
   gn_args['skia_use_wuffs'] = True
-  gn_args['skia_use_expat'] = args.target_os == 'android'
+  gn_args['skia_use_expat'] = True
   gn_args['skia_use_fontconfig'] = args.enable_fontconfig
   gn_args['skia_use_icu'] = True
   gn_args['is_official_build'] = True  # Disable Skia test utilities.