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
Turn off carrier provisioning by default to allow tethering

Whether or not to use carrier provisioning is a setting hidden to the
end user that is currently not set. Unfortunately, on some carriers that
may result in it being set to yes, or effectively set to yes, without
other accompanying changes that must occur, such as setting a tethering
apn and possibly having a carrier provisioning app, resulting in hitting
a paywall when a tethering plan exists, or, worse having nothing happen
at all when you try to tether since the data doesn't have an apn set.

Change-Id: I3b5b3cc86e3325302411f46e3fd5f7a7c1b9f57e
Add clear all recents action to recents panel

Change-Id: I2243ebc83abc483e78b112900a653d7e61edc5ba

Conflicts:
	packages/SystemUI/res/values/cm_strings.xml
Fix - place Clear Recents button above the nav bar

Change-Id: Ie7059cd1f71bae28ff25f367221b7c7ba0131932
Fix up 'clear recents' UX.

Use the 'dismiss all' button drawable and place the button in the upper
right corner. Doing so fixes the broken animation when going into
recents.

Change-Id: I497a8b023f1872c5f9ae5df87af6ed2159e6b7b1