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
Show live wallpapers in the recents view on high-end devices

Change-Id: Iefbf4f292b6a9bfdb516f154cc2976db2ba86cde
NetworkController: Hide signal strength icon when no SIM icon is shown

Change-Id: I5c4b43bba1469e14474d20a3627eafa597459e6e

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/policy/MSimNetworkControllerImpl.java
screenshot: quick delete action

Add option to delete screenshot from notification

Change-Id: I0f153bc3c72b902163b4ae75e220ddb09e3fcb11

Conflicts:
	packages/SystemUI/res/values/cm_strings.xml

Conflicts:
	packages/SystemUI/res/values/ras_strings.xml

Conflicts:
	packages/SystemUI/res/values/simpleaosp_strings.xml
Move screenshot delete strings to nexus_strings.xml
SystemUI: Use material delete icon

Change-Id: I11df5713486672e4f5c4784e6f94a893cf36b4dd