SystemUI: fix pulldown header for themes

Change-Id: I3607a146a2f44dc26c1d972708779c841ef7d8ae
Signed-off-by: Roman Birg <romanbirg@gmail.com>
frameworks: Smooth background gradient

Credit to UBER for the images

Change-Id: I3655e9917610348100fa6cb5cede66a63ca82538
Improve AOSP Download/Upload animation

This increases the number of png required for a full download/upload animation cycle.
These new png makes the animations much smoother.

Change-Id: I7120d757782e797809bc97747127c6a0cc36f2fe
change default for unknown sources & verify apps

Change-Id: I04467c0c1ef3985b416f6e58013ddc3ce4137712