Fix Transparency Value not sticked with autohide

PS2: move settings TransparencyManager out of if block

Change-Id: I02f4984144867561955bf2b73291f503d6c1b1e7
Signed-off-by: kecinzer <kecinzer@gmail.com>
SystemUI: unregister ContentObserver

We were leaking memory.

Change-Id: Ie9ddf00c698692f418cb8ef473dff2b1aa05135d
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>