[1/2] Base: implement App circle sidebar

add whitelist app to include into circle view
rebased
make standalone patch

PS.15 : rebased
PS.16 : cleanup

Change-Id: I08d2a3a7e0f8df20e801e585d4cac8547a740a3e
Base: App Circle sidebar (add support floating window)

PS.8 : rebased
PS.9 : add support minimize/maximize window

Change-Id: Ied388a0a4054dfaf1d3e6fcdc33dd5aab28565a9

Conflicts:
	packages/SystemUI/res/values/custom_strings.xml
Base: App Circle sidebar (add support Samsung multiwindow flags)

this will automatically add app into app circle sidebar
if apps support samsung multiwindow flags
in their manifest

PS.2 : rebased

Change-Id: Ifa8965f1fb5d24987aed7d6d52a4e77deb48c455