Expose sky KeyboardService in android mojo_shell

shell/android/library_loader.cc

Index: shell/android/library_loader.cc
diff --git a/shell/android/library_loader.cc b/shell/android/library_loader.cc
index f642f9c3c47cbf2e7ce8c72cf4b32ca304e4b1a9..986d53faea3ea9152dc8ac5500afd8d448a84f09 100644
--- a/shell/android/library_loader.cc
+++ b/shell/android/library_loader.cc
@@ -7,6 +7,7 @@
 #include "base/android/jni_android.h"
 #include "base/android/jni_registrar.h"
 #include "base/bind.h"
+#include "mojo/android/system/core_impl.h"
 #include "services/native_viewport/platform_viewport_android.h"
 #include "shell/android/android_handler.h"
 #include "shell/android/intent_receiver_manager_impl.h"
@@ -28,6 +29,9 @@ bool RegisterJNI(JNIEnv* env) {
   if (!base::android::RegisterJni(env))
     return false;
 
+  if (!mojo::android::RegisterCoreImpl(env))
+    return false;
+
   return RegisterNativeMethods(env, kMojoRegisteredMethods,
                                arraysize(kMojoRegisteredMethods));
 }