Dialer: Landscape support (for in-dock use / qwerty sliders)

Change-Id: I3dedd339c59f8ffb184bd685712d73732b3d884b
Dialer: Update landscape layout to match 4.4.3 codebase

Change-Id: Ib7768010ba88581030bdda902751ca7593f18b46

Conflicts:
	res/layout-land/dialpad_fragment.xml