Remove GwtIncompatible from EmulatedCharset.

Change-Id: I171da06d9a99ff617fb4f35d8108088bfb43bc24
Review-Link: https://gwt-review.googlesource.com/#/c/14221/
diff --git a/dev/BUILD b/dev/BUILD
index bbb6c87..de10940 100644
--- a/dev/BUILD
+++ b/dev/BUILD
@@ -216,6 +216,7 @@
         exclude = [
             "core/super/com/google/gwt/dev/jjs/intrinsic/**",
             "**/package-info.java",
+            "**/EmulatedCharset.java",
         ],
     ),
     compatible_with = ["//buildenv/target:android"],