hercules: Gallery2 overlay is no longer used

Change-Id: I9e393fa9fe2602966ea210de88666bed035c46c5
hercules: Clean up Samsung device inheritance

* Remove init.qcom.usb.sh
* Move torch package up to msm8660-common
* Move common items from device to celox-common
* Use nested cm.dependencies
* Move common system properties to celox-common, msm8660-common

Change-Id: I3a80ae80ffb7c4f8acc36c66395fdf3acc962ccf