Update: update agl-service-windowmanager-2017

Update: update agl-service-windowmanager-2017

Following commits are included:

6373ce0 Add signal when the displayed application changed
3e58f01 Clean: sort source code according to the order of header file
0f05870 Fix class name "App" to "WindowManager"
4c5fda5 Refactor: Integrate rework handles by application
847dde9 Rework: Window Manager handles by application
d1127dd Add Get/Set area size functions
2a35277 Bug Fix: Window Manager doesn't react after killing app process
714b578 Clean: remove small files
be9cbe2 Clean: remove useless headers
43ff4c2 Fix Client Context of afb-binder
01d26af Remove the unnecessary property
2357c43 Format source codes
d50188f Update document
c83642c Change reply timing
5d05965 Send visible event after commit change

Change-Id: I293fd865c02b2626259ce6a23c6611458bc82bf1
Signed-off-by: Kazumasa Mitsunari <knimitz@witz-inc.co.jp>