Fix guts not expanding when QSPanel is expanded

When exposing notification guts, we notified height changed event
without expandable view(row). Then, when QSPanel is expanded,
NotificationPanelView did not update its height and guts was not
expanded properly due to lack of height.
So fix it by notifying height changed event with expandable view
when expose notification guts.
Also, do not request animation when panel is collapsed.

Test: Expand QSPanel > Long press on the collapsed notification >
      Verify guts expanded properly

Change-Id: Id7abd858800036fd6ff11c003c079c84c7ea54ef