JOB-30658 Add ability to set authorization headers

[ryanb-jobber]

Adds the ability to add headers to the API calls. This will be used to authorize the calls to our proxy server.

Based on FaridSafi#660 but made more generic to support arbitrary headers.

To test, you can update the dependency in your jobber-mobile package.json to

"@jobber/react-native-google-places-autocomplete": "GetJobber/react-native-google-places-autocomplete#JOB-30658/add-auth-headers",

And then try supplying a header like so:

            requestUrl={{
              url: "",
              useOnPlatform: "web",
              headers: {
                "myheader": "test",
              },
            }}

[cwtedwards]

Oh it looks like I never put this into review, apologies!

• can see headers on the request

LGTM