[Bugfix][API-1423][T8TSK-285]Fix the problem that oemapp is not mounted

Only Configure: No
Affected branch: GSW3.0-No-Connman
Affected module: fota,backup
Is it affected on both ZXIC and MTK: only MTK
Self-test: Yes
Doc Update: No

Change-Id: I379fa7c7f53e673ad929d22434f1eb14234b232a
1 file changed