Move OnSettingsChanged callback into callback of weave::Device

BUG:24267885

Change-Id: I648568ccb31186692b97dd2149cbb9d95ba14771
Reviewed-on: https://weave-review.googlesource.com/1203
Reviewed-by: Vitaly Buka <vitalybuka@google.com>
12 files changed
tree: a48e562c70f821d52a7adfd7e413a4bc83fe2a7c
  1. libweave/