Settings: sound on power on pluged needs an onpreferencechange listener  now

due that we are using now only onpreferencechange due that
onclicklistener is depreciated we need to set the onchangelistener.

Add them to have it working.

PatchSet:

Preference allone still  needs onClickListener...stupid google

Change-Id: I4c6c67207b52a28b17d77513702ea38311b9e900