Correct non-opaque list separator assets.

Fixes http://b/2186076
diff --git a/core/res/res/drawable-hdpi/divider_horizontal_dark.9.png b/core/res/res/drawable-hdpi/divider_horizontal_dark.9.png
index 30a68d0..338d840 100644
--- a/core/res/res/drawable-hdpi/divider_horizontal_dark.9.png
+++ b/core/res/res/drawable-hdpi/divider_horizontal_dark.9.png
Binary files differ
diff --git a/core/res/res/drawable-mdpi/divider_horizontal_dark.9.png b/core/res/res/drawable-mdpi/divider_horizontal_dark.9.png
index 548d0bd..bf45e38 100644
--- a/core/res/res/drawable-mdpi/divider_horizontal_dark.9.png
+++ b/core/res/res/drawable-mdpi/divider_horizontal_dark.9.png
Binary files differ