Add empty state screens.

The added screens are for the following scenarios:
- No resolved apps on the visible tab
- Sharing not enabled by admin for the visible tab for both
directions, work->personal and personal->work
- Work profile is disabled

Other changes in this CL:
- Make the intent resolver height suitable for the empty states
- Handle landscape mode gracefully by hiding the content preview
if the tabs are shown
- Show the content preview view as part of the list view if there
are no tabs present, and above the tabs if tabs are present
- Remove elevation if showing the tabbed view

What's left:
- Finalize strings

Test: manually tested all conditions for the empty state screens
Test: atest com.android.internal.app.ChooserActivityTest
Test: atest com.android.internal.app.ResolverActivityTest
Bug: 142537267
Bug: 142538125

Change-Id: I4e5ab5fa368d2b907e3fa74b00a82d8739e4f229