Mode switcher refinements.

- Increase the mode switch icon size.
- Change mode cover color to 0x191919
- Change the font of mode text to roboto medium
- Change the highlight state of mode icon to fill

Bug: 12954273
Bug: 12954790
Bug: 12954370
Bug: 12953261
Change-Id: I23ef62ae4ce5589da20c7ee6bf805e5af70b62f2
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 59b36cc..0a2a694 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -154,8 +154,8 @@
     <dimen name="photoeditor_original_text_margin">4dp</dimen>
 
     <!-- Mode selector icon width -->
-    <dimen name="mode_selector_icon_block_width">48dp</dimen>
-    <dimen name="mode_selector_icon_drawable_size">32dp</dimen>
+    <dimen name="mode_selector_icon_block_width">56dp</dimen>
+    <dimen name="mode_selector_icon_drawable_size">48dp</dimen>
     <dimen name="mode_selector_item_height">60dp</dimen>
 
     <!-- Filmstrip bottom controls -->