Update build.gradle and add prechat form

[zanechua]

Updated build.gradle to conform with the latest zendesk android sdk.

Added a prechat-form for android to define a more consistent experience for both iOS and Android.

Only issue now is I've hard-coded the requirements for the prechat-form. I did have a initial look into how i could define the same options in iOS to make certain fields optional but did not have the time to follow through on that.

[fbartho]

I love the gradle updates, we hadn’t looked at that yet!

I’m however uncomfortable requiring the PreChat form unless we can configure it, and potentially change the requirements. Is this feature only available on Android?

[zanechua]

The feature is available in both android and iOS. In the current code, iOS already has the code for the prechat-form at https://github.com/taskrabbit/react-native-zendesk-chat/blob/master/ios/RNZendeskChatModule.m#L42 . I had to add this in as we do use the prechat-form for zendesk and it would be confusing to have different experiences across platforms.

I'll see if I can find a way to define the options so that we have unified options for both platforms but no promises at the moment.

[fbartho]

Good catch! Please forgive my unfamiliarity with this codebase and Android. I just assumed that that was a built-in difference between the underlying SDKs!

[zanechua]

No worries. Just want to see the changes merged in so I don't have to maintain a scoped fork of this. 😄