Give SliceView a height to support four rows and show more button.

The default height of sliceView with MODE_LARGE is 240dp which supports
three rows(including the header) above "show more" button. Since WIFI
and Connected devices use cases require four rows + show more button, we
need to expand the height to fulfill it.

Bug: 117868297
Test: visual
Change-Id: I13b29c3f859d1c117c680432f9a6ad8e71c6acf5