Improve scrolling cache

Scrolling cache helps make short scrolls/flings smooth but will
cause stutter when long flings are made. This patch disables
scrolling cache when long flings are made.

This patch also fixes a related bug where scrolling cache will
not be enabled properly when transitioning from flinging to scrolling.

Patch Set 2: Calculate threshold based on maximum velocity (Sang Tae Park)

Credits: Pawit Pornkitprasan

Change-Id: I1fdbaad92263c9f983a32900e74eba1f0367902b
Signed-off-by: Arham Jamal <arhamjamal@gmail.com>
Smoother Upload and Download Animation

Change-Id: I6e6409cc85ad951019dbac10156d4aed92f4c5bc
Frameworks: speed up statubar/notification drawer

a lot user complain about slow statusbar pull down introduced
with jb 4.2....this speed it up

thanks to IceColdJelly

Change-Id: Iae108f5680b25ea995168a505a30e06bef0185d3
SystemUI: Fix potential NPE

Does already cause issues on some Halo ports to other ROMs.
Might not cause issues on PA (yet), but better safe than sorry.
change default for unknown sources & verify apps

Change-Id: I04467c0c1ef3985b416f6e58013ddc3ce4137712
Keaguard: enable translucent keyguard by default

currently it is possible to enable it per device over an overlay and it is disabled
by default. Enable it by default but respect general transluscent disable from
device tree. Manta eg disables this feature due of graphical glichtes.

Change-Id: I3579d47ee3bee05719ef357ffcf19c0137b2302f
SystemUI: Always show translucent decor on recents panel

Change-Id: Id3e371f841b065ba6ac7693d96b38504354b4fd9