Bluetooth: Update user group for smd channels

This patch updates the user group of smd channels to net_bt_stack.
Without this change, it was not possible for non root user to open
the smd channels resulting in Bluetooth not getting turned on.

Change-Id: I20a53c11a0ed4baba21f16243bde7d18a89adfc2
CRs-Fixed: 506011
common:Add prima_wlan into to PRODUCT_PACKAGES

Add prima_wlan into to PRODUCT_PACKAGES. This change is needed to
build wlan driver for User variant builds

Change-Id: If7e9b4f0e3a2cd92ef390f9f6e5cb472457982ad
CRs-Fixed: 509116
Merge "common:Add prima_wlan into to PRODUCT_PACKAGES"
Merge "Bluetooth: Update user group for smd channels"