halo, bugfixes

1. fixed size for content
2. flip animations for tasking only
3. batch size calculations
4. not a bug but pinned and system both get the same icon for now

Change-Id: I755cd4e88c909ab8b982e014d470791661a0041e
Launch floating notifications from notification panel (long click)
 * Status bar - long click on notification select 'floating mode' option
 * PIE - long click on notification, auto launches floating window