Use correct back icon for xxxhdpi

Bug: 18415357
Change-Id: Ieb819674d1575e89add08723fd6a6268215c4bb5
diff --git a/res/drawable-xxxhdpi/ic_arrow_back_24dp.png b/res/drawable-xxxhdpi/ic_arrow_back_24dp.png
index 037b6f1..3b72636 100644
--- a/res/drawable-xxxhdpi/ic_arrow_back_24dp.png
+++ b/res/drawable-xxxhdpi/ic_arrow_back_24dp.png
Binary files differ