NavRing: fix icon size

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

Change-Id: I1a816eccd3c77158a0c9c7631c3a7334b4fb3c24
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Merge branch 'jellybean' of https://github.com/XYAOSP/frameworks_base into jellybean