[RON-AOD] Fix NotificationToplineView Margin in Skeleton

This CL makes the alignment of NotificationToplineView in AOD skeleton in line with Notification.java.

Fixes: 408312509
Flag: android.app.ui_rich_ongoing
Test: Post a RON with a large subtext to have a long ToplineView. Observe it has enough margin end. Repeat it with largeIcon.
Change-Id: I6ab6f2095f5bcb5654b52c2b848dddf6b8da8e12