am b4a8ec9f: (-s ours) am 5a02de8b: am 74294808: am e6406e35: (-s ours) Check for the presence of accel and magnetometer sensors before adding AOSP fusion sensors. DO NOT MERGE

* commit 'b4a8ec9f3dc3b4a73ee35a900d5646cfc35b8b91':
  Check for the presence of accel and magnetometer sensors before adding AOSP fusion sensors. DO NOT MERGE