fetch: Rewrite again to more accurately reflect our usage
fetch: Rewrite again to more accurately reflect our usage

Essentially, instead of treating `Fetch` as an implementer of
`GlobalFetch`, this implementation only *prepares* the request in the
constructor, then the `json` or `text` methods actually fire and
complete the request.

Signed-off-by: Kristofer Rye <1ed31cfd0b53bc3d1689a6fee6dbfc9507dffd22@gmail.com>

StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native,StoDevX/AAO-React-Native