BUGFIX: zero_copy_stream fof {i,o}fstram is for 'full' protobuf only.

Also changed typo name from 'sensor-cofig' to 'sensor-config'

Test with this, and monitor adb logcat
```
make -j8 sensorfirewall-cofing  && adb push
out/target/product/mako/system/bin/sensorfirewall-cofig
/data/bin/sf-config && adb root && adb remount &&  adb shell
'/data/bin/sf-config' && adb shell 'ls -l /etc/firewall-config'
```

SensorService.cpp is still broken, have to fix. Probably won't compile

Change-Id: I47d1473393ae0a8af3041222c89fd0898c367081