NavRing: fix icon size

This will add some icon resizing if the app icon is
bigger than the standard icon for the divice density.

Formatting.

Change-Id: I1a816eccd3c77158a0c9c7631c3a7334b4fb3c24
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Adjust margin of ActivityPreference

This will use all the space available in Settings and RC

Change-Id: I9c92770a5f4315eb50fb350d6a60d3789e424f59
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>