V12 changes for cornering.

	modified:   bcb_app/res/drawable-v12/slot_desc_background_drawable.xml
	modified:   bcb_app/res/drawable-v12/slot_desc_fixed_background_drawable.xml
	modified:   bcb_app/res/drawable-v12/slot_time_background_drawable.xml
	modified:   bcb_app/res/drawable-v12/slot_time_fixed_background_drawable.xml
	modified:   bcb_app/res/drawable-v12/update_message_bottom_background_drawable.xml
	modified:   bcb_app/res/drawable/update_message_bottom_background_drawable.xml
	modified:   bcb_app/res/drawable/update_message_top_background_drawable.xml
	modified:   bcb_app/res/layout/session_details.xml