FWBase - Floating Window: Welcome back

* Port squashed jellybean floating window to kitkat.

Floating window contributors:
@drcmda
@beerbong
@D4rKn3sSyS

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Merge notification manager service changes.

Change-Id: I823ce054549c7a7da2759097e3e08fbeacb9d3cb
Signed-off-by: MURA Stefano [STELIX PippoX3] <ssspinni@gmail.com>