init: add a new charger-fs trigger in the power off charging mode

Add the charger-fs trigger and mount the charger file system earlier
than the propery service init in the power off charging mode.

Change-Id: Iecc0fcdabca836365d6822ca6ef9e0944258d687
Merge remote-tracking branch 'CM_system_core/cm-11.0' into cm-11.0