1) remove fsmanager_static from libbegetutil
2) declare fsmanager_static as inner api for updater only
3) remove begetctl and partitionslot dependency for fsmanager by accessing /dev/block/by-name/misc directly
Signed-off-by: Nhandyohos <zhangxiaotian@huawei.com>
Change-Id: I5288d77b07e5e993cbe68eff8803a130a11b009a

#I5YBEN