sensors: Allow opting out of default batch size

* In commit d49b1ee0,
  Google introduced a default batch size for the
  accelerometer, meant for Android Wear devices
* For some bizarre reason, this change breaks
  rotation on certain devices
* Specifically, this behavior has been noticed on
  some devices using Samsung's Sensorhub firmware
* As a result, add an overlay to allow opting out
  of this default accelerometer batch size in
  order to fix rotation on certain Samsung devices
* Thanks to Martin Bouchet <tincho5588@gmail.com>
  for pointing me to the offending commit in fw/b

Change-Id: I8769147e1b1553a8fbad03340745a7e7377b8510
Signed-off-by: Paul Keith <javelinanddart@gmail.com>