Lockscreen: option to use carousel animation when switching widgets (1/2)

This will add the option to use a carousel animation when
switching betweeen the widgets on the lockscreen.

PS2: rebase
PS3: fix NPE in tablet layout
PS4: fix include name
PS5: DERP!!!!

Change-Id: I1ad69810b5f012b56cb047dce47a39c1e8f542a2
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
installd: Delete cache properly for devices using datadata partition

The java side already checks /data/data for free space but installd
still checks /data causing it to never reap the cache (because it
thinks that enough free space is available.)

Change-Id: I736af6ff7ea0c8ae07900168f6b8ac2f7a4dbe0b