better error handling in SensorManager
better error handling in SensorManager

Change-Id: Id0498e950f1407a10e3b2d88e63c2141ac95d103

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base