put inherit-product after DEVICE_PACKAGE_OVERLAYS, PRODUCT_COPY_FILES and PRODUCT_PROPERTY_OVERRIDES

[Zkdc]

It seems that the former configs in these variables(DEVICE_PACKAGE_OVERLAYS, PRODUCT_COPY_FILES and PRODUCT_PROPERTY_OVERRIDES) overrides the latter configs. for example:
PRODUCT_PROPERTY_OVERRIDES += ro.config.zram.enabled=true ro.config.zram.enabled=false
will get ro.config.zram.enabled=true in the build.
So we need to put these these variables before inherit-product to override the configs in inherited files instead of letting inherited files override our configs.