prepare for 3.4.0 release (optimizely#355)

Update CHANGELOG for patching http client. (optimizely#350)

Update CHANGELOG for patching http client. (optimizely#350)

release off of master (optimizely#347)

(chore): prepare for 3.3.2 release (optimizely#344)

* prepare for 3.3.2 release

* add pr to release comment

(chore): chrerry pick changes to 3.3.x. (optimizely#342)

* (fix): use a ParserSupplier instead of java.util.Supplier to enable work on older versions of Android. (optimizely#340)

* use a ParserSupplier to enable work on older versions of Android.

* remove the generics

* update for new release for android support (optimizely#341)

Update changelog for 3.3.0 release. (optimizely#339)

Update changelog for 3.2.1. (optimizely#332)

Update changelog for 3.4.0-beta release. (optimizely#326)

Update CHANGELOG.md for 3.2.0 release. (optimizely#314)