mm: compaction: compact all zones when turning off screen

Register to fb notifier to compact all zones when turning off screen.
Also do the compaction periodically if screen is kept on.

Change-Id: I6b022c5d9cf4ebbcec7e60e667ce7b3abf20a7a4
Signed-off-by: Yuanyuan Zhong <zyy@motorola.com>
(cherry picked from commit 1adb25f6aab388e54877d7242c2314dbcf92ad35)
Reviewed-on: http://gerrit.mot.com/697881


SLTApproved: Slta Waiver <sltawvr@motorola.com>
Tested-by: Jira Key <jirakey@motorola.com>
Reviewed-by: Jeffrey Carlyle <jeff.carlyle@motorola.com>
Submit-Approved: Jira Key <jirakey@motorola.com>
Reviewed-on: http://gerrit.mot.com/725474


SME-Granted: SME Approvals Granted
Submit-Approved: Jason Hrycay <jason.hrycay@motorola.com>
Tested-by: Jason Hrycay <jason.hrycay@motorola.com>
Reviewed-by: Christopher Fries <cfries@motorola.com>