Smooth Spinners: Makes the loading "spinner" animation smoother in non-holo apps

The loading "spinner" animation is quite jerky by default when the progress xml's from
drawable are called in applications that don't use the holo progress animation. The holo
"spinner" animation is already smooth by default. This makes every other "spinner"
animation smooth.

We've been changing this value in all ROM's we release, both AOSP and CM based ones
as well as stock ROM's, since it gives a more polished look to the entire system. In the past
3 years we've been using this small tweak we have not noticed anything that would
adversely affect battery life or system operations as a whole.

Rebased to cm-10.1 by Kristof Petho

Change-Id: I617d197c2ff4f1a27e96dbc206c24c27036e18d6
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: Iad52a35120212c871ffd35df6184aeb678ee44aa