More mdpi artwork.

Change-Id: I53f7985a2fe0dc4e61143242c110f3604e8ed1a1
diff --git a/res/drawable-mdpi/home_button_focused.png b/res/drawable-mdpi/home_button_focused.png
index 08b1fcb..0eb4a66 100644
--- a/res/drawable-mdpi/home_button_focused.png
+++ b/res/drawable-mdpi/home_button_focused.png
Binary files differ
diff --git a/res/drawable-mdpi/home_button_normal.png b/res/drawable-mdpi/home_button_normal.png
index 4afcce8..0a1c105 100644
--- a/res/drawable-mdpi/home_button_normal.png
+++ b/res/drawable-mdpi/home_button_normal.png
Binary files differ
diff --git a/res/drawable-mdpi/home_button_pressed.png b/res/drawable-mdpi/home_button_pressed.png
index aa91732..d4a0ab4 100644
--- a/res/drawable-mdpi/home_button_pressed.png
+++ b/res/drawable-mdpi/home_button_pressed.png
Binary files differ