Adjust multi-window UI for InCallUI <100% modes.

This CL is a direct copy from ag/864936. The original CL missed the move
from InCallUI to Dialer/InCallUI.

Origianl description:
Multi-window mode reduces the available screen real estate for the
InCallUI. As a result, some changes need to be made so important
information is still shown. When the UI has <100% of its normal screen
real estate:
* Remove large photo
* Shift hangup button down

the way the resource files should be interpreted:
* The base layout/ is the default layout, in this case, it is the
multi-window layout
* layout-h600hdp is the layout used when the screen height is >=600 dp,
which is the layout in 100% screen size (this is a direct copy of the
old layout/ file(s)
* layout-w600dp-land is the layout used when the device is in landscape
mode with a width >=600 dp (this is a direct renaming from *-land/)

Bug:26253432

Change-Id: I3db194a1e5b3334d10ab76806644b1a0769ad777