[VD] Show window for background execution app in deeplink scenario

[VD] Show window for background execution app in deeplink scenario

Now, for backexecution(http://samsung.com/tv/metadata/background.execution.support)
app, when app go background, WRT will call evas_object_hide() manually, it's a new
logic for 'add Gaming hub feature'(https://review.tizen.org/gerrit/259693/), bcz
WRT call evas_object_hide(), so appfw clear win cache data in its side, then appfw
cannot raise window(__raise_win()) while app launch by deeplink(unneed reload).
   To fix this issue, when app launched by deeplink(unneed reload) and this app config
background execution metadata, WRT will show it manually.

Change-Id: I93229016cb08314adce3ebee8a80dfba35e8ba67
Signed-off-by: liwei <wei90727.li@samsung.com>