Groundwork to implement landscape and welcome screen

java/res/color/setup_step_action_background.xml

java/res/layout/setup_start_indicator_label.xml

java/res/layout/setup_steps_cards.xml

java/res/layout/setup_steps_screen.xml

java/res/layout/setup_steps_title.xml

java/res/layout/setup_wizard.xml

java/res/values-sw600dp-land/setup-dimens.xml

java/res/values-sw768dp-land/setup-dimens.xml

java/res/values/setup-dimens.xml

java/res/values/setup-styles-common.xml

...rc/com/android/inputmethod/latin/setup/SetupActivity.java