Add emoji keyboard related assets

Bug: 6370846
Change-Id: I86c446665387b5ddf7de08189de306f2bc569262
diff --git a/java/res/values/themes-common.xml b/java/res/values/themes-common.xml
index c9334ce..04c4a52 100644
--- a/java/res/values/themes-common.xml
+++ b/java/res/values/themes-common.xml
@@ -101,6 +101,7 @@
         <item name="suppressKeyPreviewAfterBatchInputDuration">@integer/config_suppress_key_preview_after_batch_input_duration</item>
     </style>
     <style name="MainKeyboardView" />
+    <style name="EmojiKeyboardView" />
     <style name="MoreKeysKeyboard" />
     <style name="MoreKeysKeyboardView" />
     <style