evita: use default naming for proprietary libs

HTC uses ro.hardware for the alternate board names, which is being
overwritten. Use the default 'default' name for HAL library names.

Change-Id: Ib94c8e89fb1d110def78c8506b456388f5e19ea7
evita: move cand to device tree

Change-Id: If00d56359a16d39bf7be29188ab3b1028c875242