Revert "Revert "config_deviceHardwareKeys: the correct default is 0""

This reverts commit 1a8b544314dedccd548e0afca093b39edde32607.

Change-Id: I99efcf5490855359aa926f30d17c5816e635b4e3
Merge "Revert "Revert "config_deviceHardwareKeys: the correct default is 0""" into L5