Always insetting the widget by a minimum of 6dp

Removing default widget padding logic. Also widget padding it applied
at ShortcutAndWidgetContainer so that the widgetView always has the
correct size.

Bug: 274826296
Bug: 257589413
Test: Verified using screenshots
Flags: N/A
Change-Id: Id4b5e94db6ec7b2aa3dca87b1e9ccc831b608cac
15 files changed