* Preserve the aspect ratio for the card attribute images * support background on horizontal cards with summary (LP: #1393008) * Background needs to be specified to be visible in horizontal cards (LP: #1411748) * Don't show() the lockscreen if it's already being shown * Create a PhysicalKeyMapper to handle all physical/hardware keys * Create a PhysicalKeyMapper to handle all physical/hardware keys * Allow swipe-to-dismiss for contracted snap-decision notifications, interactive notifications and ephemeral notifications. (LP: #1355422, #1334855)