ASACORE-1188 Home directory should be application directory

Change Home directory to application directory for Windows.

Currently BusAttachment::EnablePeerSecurity isn't working for
store applications on Windows because the "home" directory
is inaccessible by them.

This fix changes the preferred home directory to the default
local app data (Windows only), which is defined by %LOCALAPPDATA%
and falls back to %USERPROFILE% for non-store apps.

Change-Id: I1e141772faac5195091419369b3dfa4f73614f94
Signed-off-by: Way Vadhanasin <wayvad@microsoft.com>