[M108 Migration][MM] Prevent suspend and release a player during prolonged pause.

[M108 Migration][MM] Prevent suspend and release a player during prolonged pause.

If a player pauses for 15 seconds, it becomes a 'stale' state.
The stale players is suspended and released, but it causes unexpected behavior
such as black screen.
This patch therefore doesn't suspend the stale players.

Reference:
https://review.tizen.org/gerrit/#/c/276980/
https://review.tizen.org/gerrit/#/c/277231/

Change-Id: I9190275c60a5c0b66b583ca75cd7e8132a37bc58
Signed-off-by: Sun-woo Nam <sunny.nam@samsung.com>