services: don't clear wallpaper when SystemUI
disconnects.

When we restart SystemUI (or the user), sometimes
the wallpaper would get cleared. This patch just
captures its originating component and
if that is our SystemUI component, ignore the event.

Change-Id: I3e159dc2c013e7d7e552e3c0cef55e3ab970ca87
Signed-off-by: Roman Birg <romanbirg@gmail.com>
fb: fix google observer derp

the way it was it does not detect any observer change on the
immsersive value. Fixed it by settings it to Secure completly

Change-Id: If8cf887650668e2399367e09614e91cc30b7f70b
Merge "services: don't clear wallpaper when SystemUI disconnects." into kk44