[Bug 8934] Ensure we create the devices.xml at the same location where we try to read it. Refactor copied method so single method called from SDKManager in core by SDKPreferencePage in ui. Ensure errors are reported in error log. Show dialog when unable to add SDK.

# use glob syntax.
syntax: glob
bin
runtime
\.DS_Store
connectivity/com.nokia.tcf/os/*
connectivity/com.nokia.tcf/native/TCFNative/*/Release
connectivity/com.nokia.tcf/native/TCFNative/*/Debug