SDK-1612. Fix for needsRescan flag for entire sync tree after filesystem notification failure.
SDK-1612. Fix for needsRescan flag for entire sync tree after filesystem notification failure.

(cherry picked from commit 37ed291228d4aac2757b0da8745c4c922bc38926)

meganz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,meganz/sdk,meganz/sdk