CMSDK: Create support for ExpandedStyles in CustomTiles.

  Applications can now set and expanded style for either a
  gridview layout or a listview layout when providing content
  to be shown in the details panel.

  The mechanism is shown below

  mCustomTile = new CustomTile.Builder(this)
        ...
        .setExpandedStyle(new CustomTile.ListExpandedStyle())
        .build()

  Within SystemUI, if your application states that it wants an expanded
  view, the expanded view onclick will take priority over both
  the onClick intent as well as the onClickUri.

Change-Id: Ib181dab32d1792b6b778fd1ea2f0531bdf407c5f