hammerhead: enable sensor after factory reset

Before executing sensordaemon, must make connection with sensor subsystem.
After factory reset, doesn't make connection with sensor subsystem.
To connecting with the sensor subsystem, set /data/system/sensors/settings to 1.
However, couldn't make /data/system/sensor directory.
Because there is no /data/system directory.
So, make /data/system directory to enable sensor after wiping data.

Change-Id: I8867311ec3284be8cf1308356edb6529e8903c98
1 file changed