SystemUI: fix current window minimize animation in recents

This is how it's implemented by default on stock

Change-Id: I07ffd8ab7236782e23fba20057232ca518c0a4d1
Signed-off-by: Roman Birg <romanbirg@gmail.com>
SystemUI: fix long-press navring targets not opening in keyguard

Change-Id: I80d63b7a9b8429d19bcad5a15419c9e72def1f70
Signed-off-by: Roman Birg <romanbirg@gmail.com>
add recent apps action to navbar buttons (1/2)

This will add the option to open the recent application dialog.
This is the dialog that will show when doing <Alt><Tab> with
a bluetooth keyboard.

Change-Id: Id7894b698c43683467d7e8283b4b2b3dd1946f87
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>