Revert "enable Conscrypt back as the bug seems fixed in GMS"

This reverts commit 792347fc6ce03e7147a08c5519caf6b9c139db76.
add a constructor with a custom HttpEngineFactory
add `equals()` methods in XferTransform
we require a ResponseHandler and a ErroHandler when not streaming
remove all the code for non strongly typed queries
fix the chain not flattened when using the Builder.init()
fix the error handling in Ion, we need to use an AsyncParser that outputs data that can be used to generate the output of the error data
so we use the common transform between the 2, if no match is possible, fallback to HttpUrlConnection