We need to use setSelected in order to add a ripple effect when a header is selected in tablet landscape mode, and to set the style through XML rather than programmatically the way it was done before in the method `setLargeScreenTheme`.
Fix: 268558453
Test: Turn on LARGE_SCREEN_WIDGET_PICKER and verify that when selecting a header there's a ripple effect on that header
Change-Id: I6cab920258a57118430d1e07416508ef36faa56d
Replacing drawables interrupts touch feedback of ripples. Implementing
custom state lists allows altering the corner radius without cutting off
ripples and also means we reduce unnecessary object creation.
Fix: 190467676
Test: locally
Change-Id: I10eec042aae57d278f8254327d42df945767c7ac
Federico Baron
Stevie Kideckel