Smartspace - Next alarm

Support next alarm appearing next to DnD. If weather is showing, show
inline, otherwise below the smartspace content. Next alarm will not
fade out but DnD will.

Fixes: 185678563
Test: atest KeyguardZenAlarmViewControllerTest

Change-Id: I21e95470d0013bfb6900c1c228dda69f5707c9e6