Frameworks: activate PIE on Lockscreen

completly activate it now if navbar is disabled, expanded desktop or
whatever. The bottom trigger can be used on Lockscreen
if the user want (left and right does not make sense due the wigets.
If navigationbar hints are disabled it show instead
the home button the tinny circle which opens search/gnow. Longpress
action is the same like the one which was bind to the homebutton

slight adjust of default values trigger height and overall size

as well colorize and set alpha  on navbar for the tinny keyguard circle
like the other navbar buttons to be consistent

Change-Id: Ia721d02ae44ef0f9886224414c2932f5c24c0de6