galaxys2-common: clean up warnings during init

Fix properties during init. ro.model to ro.product.model, ro.manufacturer to
ro.product.manufacturer for USB, to avoid errors during init. Use {}-syntax to
avoid the deprecation warnings during init. This fixes the device name when
connecting to a PC.

Removed duplicate definition of multicast dns. This is already in init.rc.
Duplicate definition is ignored anyway.

Change-Id: Ia414904adc2b34f14f9c340fc81b9317900a64d3

Conflicts:
	rootdir/init.smdk4210.rc
Decrease call ring delay from 3000 to 500

Change-Id: I2b3dbc97a81e33c642939eb55f79e2cf935c9e6c