Enhance session backward compatibility

Enhance session backward compatibility

In case of audio-io, mm-player, mm-camcorder, it provides interrupted_cb API to inform session resumption
to an application. Even if this callback function notifies resumption situation, the application can determine
whether resume previous stream or not in this callback. This patch is to make that when invoking focus state
changed callback for acquiring, the state of the node managed in focus server will not be updated rather
updated when the next request to acquire focus is coming from the application side.

[Version] 0.10.104
[Profile] Common
[Issue Type] Backward compatibility

Change-Id: I9d99ade37c07903cae235b0c2960dbd498306622
Signed-off-by: Sangchul Lee <sc11.lee@samsung.com>