Keyguard: Reduce font size of clock in status keyguard (sw720dp)

When system clock is configure for a 24H clock, times like 22:22, overflows the clock
of the keyguard status view on sw720dp. This change reduces the font size of clock to
allow to fit all time formats.

Change-Id: I1416c2a0f9da039f4beb4cdb77dbc5069dc47671
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>
Lockscreen: Add back lockscreen wallpaper (1/2)

Much simper implementation than in previous releases.

Change-Id: Id67bc9fc6613c9d978354556191456e1141344b9
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>