Co-authored-by: revenuecat-ops <ops@revenuecat.com>

* Migrate from kotlin-android-extensions to kotlin-parcelize

* Remove unnecessary plugin in module

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* Validate API key

* Rename amazon_ to amzn_ and small refactor in tests

* Move APIKeyValidator to purchases module

* Remove extra space in error message

* Remove some of the unused dependencies on tests on our modules

* Remove dependencies from library.gradle

* Added new  method to purchases that supports passing a

* Some test renames and small cleanup

* Change missing customer info cache error to use same codes as iOS

* Setup comments to each of the cache fetch policies for better documentation

* Test CacheFetchPolicy enum separated from PurchasesAPI

* Rename cacheCustomerInfoAndSendToDelegateIfChanges to cacheCustomerInfoAndSendToDelegateIfChanged

* Add getCustomerInfoWith listener function with fetch policy parameter

* Fix detekt after method got too long

* Refactor CustomerInfoRetriever to CustomerInfoHelper and move more functionality from Purchases to this class

* Remove left out commented test

* Make clear mocks happen during tear down

* Substitute synchronized block with annotation in setter

* Improve documentation of getCustomerInfo methods

* Add back test to make sure we don't clear cache on request errors. Adding a comment for clarification

* Move some cleanup tasks to tearDown instead of setup of tests

* Fix small issue with new test

* Fix error comment with proper behavior

…558)

* added a few cases where we retry connection

* added test

* clean up imports

* Version bump for 5.2.0

* Fix CHANGELOG format

* updated changelog

Co-authored-by: Cesar de la Vega <cesarvegaro@gmail.com>