Profile Service: Make onCreate() and onDestroy() symmetric

* Move profile service unregistration from onDestroy() to doStop()
* Make the field mAdapterService in ProfileService private

Bug: 67460963
Bug: 74511352
Test: instrumentation test
Change-Id: Ic583b895b81700dcea054bc58be8ed7e786d3778
(cherry picked from commit 2f37ccbd61df9ed864cfa0607b84b6f2ae4b3560)
4 files changed