HOVER: Fix status bar icon size

Thanks to Lo Huot

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I59d7a0d8712a5d0f7aa3dc12d9bc3e9884f69f98
Framework: Make the dialog divider color themeable

The holo blue color might not be suitable for some themes. This commit
swaps out the background of all titleDivider elements to use another
resource. This has no difference from the perspective of the user of a
"stock" build but this is huge for theme users.

Thanks to Arz Bhatia for the suggestion.

Change-Id: Icb917220accac3ad38770067120a7b1be894961a