Improved look of clear all in recents
It looked weird after adding in the padding. Made the padding bottom only, and increased the margins by 1dp

Conflicts:
	packages/SystemUI/res/layout-land/status_bar_recent_panel.xml
	packages/SystemUI/res/layout-sw720dp-land/status_bar_recent_panel.xml
	packages/SystemUI/res/layout-sw720dp-port/status_bar_recent_panel.xml
	packages/SystemUI/res/layout/status_bar_recent_panel.xml