Merge changes Icb28a169,If1dafa2c,I898305a6,I67e4708b,I73ebecb7, ...

* changes:
  Simplify getName & setName
  Move some more permission checks to the binder stub
  Simplify implementation of getUuids
  Simplify implementation of getAddress
  Simplify implementation of isEnabled
  Remove ProfileObserver
  Simplify internal handling of BT enable