Change LOCAL_MODULE_TAGS to optional
Change LOCAL_MODULE_TAGS to optional

It's invalid to set 'user' tag now.

Gateworks/packages_apps_tscalibration2,pstglia/packages-apps-TSCalibration2,iConsole/Console-OS_packages_apps_TSCalibration2,darren-clark/android_platform_packages_apps_TSCalibration2