stream-manager: A stream of manual route type should acquire focus to ensure its...

stream-manager: A stream of manual route type should acquire focus to ensure its own routing path

Previously, a stream of manual route type takes priority over streams of other route type even if they have focus.
Now it is changed that the manual route type stream should get focus to ensure its routing path.

[Version] 5.0.127
[Profile] Common
[Issue Type] Feature enhancement

Change-Id: Ib03469019e95b1938a99b9ec64049096c9982755
Signed-off-by: Sangchul Lee <sc11.lee@samsung.com>
(cherry picked from commit a3bb5c3f1f76430654cd1cdd6feeb46f720c7313)