Time service / strategy config refactoring

Change the TimeDetectorService / TimeDetectorStrategy relationship so
that the service goes via the strategy to access config. The strategy
also interacts with config via the ServiceConfigAccessor rather than
hiding it behind the Environment interface. This matches the
implementation in the equivalent time zone detector code.

This refactoring revealed a bug the equals() method of
ConfigurationInternal, which has been fixed.

Test: atest services/tests/servicestests/src/com/android/server/timedetector/TimeDetectorInternalImplTest.java
Test: atest services/tests/servicestests/src/com/android/server/timedetector/TimeDetectorStrategyImplTest.java
Test: Treehugger
Bug: 262280071
Change-Id: I4f95ca03178baa5a5fe647f6fef40a6f1394a6cf