Tentatively revert inconsistent assets

Change-Id: I90f0ffed57f0efa9f01adb969fd499e2dcd2a0dc
diff --git a/java/res/drawable-hdpi/sym_keyboard_smiley_holo_dark.png b/java/res/drawable-hdpi/sym_keyboard_smiley_holo_dark.png
new file mode 100644
index 0000000..cfacbc2
--- /dev/null
+++ b/java/res/drawable-hdpi/sym_keyboard_smiley_holo_dark.png
Binary files differ
diff --git a/java/res/drawable-mdpi/sym_keyboard_smiley_holo_dark.png b/java/res/drawable-mdpi/sym_keyboard_smiley_holo_dark.png
index 71272bb..067ad54 100644
--- a/java/res/drawable-mdpi/sym_keyboard_smiley_holo_dark.png
+++ b/java/res/drawable-mdpi/sym_keyboard_smiley_holo_dark.png
Binary files differ
diff --git a/java/res/drawable-xhdpi/sym_keyboard_smiley_holo_dark.png b/java/res/drawable-xhdpi/sym_keyboard_smiley_holo_dark.png
index 686831f..e6baa2e 100644
--- a/java/res/drawable-xhdpi/sym_keyboard_smiley_holo_dark.png
+++ b/java/res/drawable-xhdpi/sym_keyboard_smiley_holo_dark.png
Binary files differ
diff --git a/java/res/drawable-xxhdpi/sym_keyboard_smiley_holo_dark.png b/java/res/drawable-xxhdpi/sym_keyboard_smiley_holo_dark.png
index 04b7216..5973ac3 100644
--- a/java/res/drawable-xxhdpi/sym_keyboard_smiley_holo_dark.png
+++ b/java/res/drawable-xxhdpi/sym_keyboard_smiley_holo_dark.png
Binary files differ
diff --git a/java/res/layout/emoji_keyboard_tab_icon.xml b/java/res/layout/emoji_keyboard_tab_icon.xml
index d79276e..1609f6a 100644
--- a/java/res/layout/emoji_keyboard_tab_icon.xml
+++ b/java/res/layout/emoji_keyboard_tab_icon.xml
@@ -23,4 +23,5 @@
     android:layout_weight="1.0"
     android:layout_height="wrap_content"
     android:gravity="center"
+    android:scaleType="center"
 />