[Bluetooth][Bugfix] Copy value we don't own before passing to a worker

[Bluetooth][Bugfix] Copy value we don't own before passing to a worker

const char *remote_address is passed as an argument from
Native API to our callback, that adds a job to the Bluetooth's
worker.
Previously, the remote_address pointer was passed straight
to the worker. When referenced, it was already garbage.
This commit adds a copy of this value, so that the worker gets
proper data.

[Validation] Tested in Chrome DevTools. remoteAddress in JS is
a valid MAC address.

Change-Id: Id571296861775fee70d93ca94c4da0b496f9d3c8
Signed-off-by: Pawel Wasowski <p.wasowski2@samsung.com>