LE: Disable background connections if RPA offloading is not supported

If the local device does not support RPA offloading, background
connections to a resolvable random address will not work. Added callback
to indicate to the application writer that the requested operation is
not supported.

Bug: 16831527
Change-Id: I083d66b16704e997f52a40ea4daced3056b50ad5
1 file changed