connman: bump PR and add some comments

The comments are for informing anyone who wants to change USERADD_PARAMs
to make sure it's in sync with the one in xserver-nodm-init, in order
for rootless X to work.

(From OE-Core rev: c4d0b1c5438039dab07103c151c0c5a76a4c9499)

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>