plugin-api: resourced: Add window info into 'task_info' for LMK governor

plugin-api: resourced: Add window info into 'task_info' for LMK governor

Add window information list in 'task_info'.
Each window includes information such as visibility, focusing status,
and coordinate for LMK governor

resourced low memory killer (LMK) passes app information to LMK governor
during LMK process. Sometimes, LMK governor needs to know window information of
foreground app to prioritize which apps to be killed. This is because
foreground app(s) are visible status. If visible app(s) are killed by
LMK suddenly, then it embarrass the user.

Change-Id: I6b7b4ae00ca95534e7d99ec8b412909038d2fdc6
Signed-off-by: Unsung Lee <unsung.lee@samsung.com>