* Remove FIRAnalyticsConfiguration from Public header.
We haven't removed it entirely yet because we need to make changes
within Analytics to verify that the global data collection switch is
still honored and tested well. This can wait until after the breaking
change because the header and code will be internal after this change.
* Fixed incomplete comment.
* Remove self importing header.
* Moving FIRAnalyticsConfiguration calls to Analytics.
These APIS are specific to the Analytics SDK and have been moved there.
The instance methods have become static methods on the `FIRAnalytics`
class.
* Ignore more clang warnings.
* Added more context in the changelog.
* Updated CHANGELOG.
Maksym Malyhin