feat: add Httphandler class

[neel1998]

Fixes #1926

Changes: added http handler class

Screenshot/s for the changes:
N/A

Checklist: [Please tick following check boxes with [x] if the respective task is completed]

• I have used resources from strings.xml, dimens.xml and colors.xml without hard-coding them
• No modifications done at the end of resource files strings.xml, dimens.xml or colors.xml
• I have reformatted code in every file included in this PR [CTRL+ALT+L]
• My code does not contain any extra lines or extra spaces
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APK for testing:
N/A

[neel1998]

Current Architecture:

New Architecture:

@CloudyPadmal as shown in the above diagram we can add a new WIFI pathway to existing architecture. I have made two new functions commonRead() and commoWrite() in PacketHandler class... This will be the only point where the two architectures will diverge. I think this architecture is quite neat, and since we are not making any changes in the ScienceLab class we won't require to change a hell lot of code for wifi communication, which would also reduce the redundancy. This is still WIP. But kindly share your views. Thanks

[CloudyPadmal]

Yes this is the architecture proposed. Before going any further, better check if it works as intended with everything integrated (both ESP and USB).

[neel1998]

@CloudyPadmal yes. I have already tested the new architecture for USB path and it is working as expected. So that's a good sign.

[CloudyPadmal]

Let's use labels instead of change of titles

[neel1998]

@CloudyPadmal I have tested the wifi path on a dummy server. The following path in the architecture to communicate over wifi was able to make get/post request to a server,

ESPFragment -> Initial Connection -> HttpAsyncTask -> HttpHandler -> HttpCallback

I think we can merge this basic architecture and then develop further on top of it.