Add Currently Playing Media Image to MediaServiceData

[joeygrover]

Fixes #1047

This PR is ready for review.

Risk

This PR makes minor API changes.

Testing Plan

Code snippet

                    final SdlArtwork mediaImage = new SdlArtwork("mediaImage.png", FileType.GRAPHIC_PNG, R.drawable.media_image, false);
                    sdlManager.getFileManager().uploadArtwork(mediaImage, new CompletionListener() {
                        @Override
                        public void onComplete(boolean success) {
                            Log.i(TAG, "onComplete: service published and file sent");
                            if(!success){
                                Log.e(TAG, "onComplete: file didn't send correctly");
                                return;
                            }
                            OnAppServiceData onAppServiceData = new OnAppServiceData();
                            MediaServiceData mediaServiceData = new MediaServiceData();
                            mediaServiceData.setMediaTitle("The title is media");
                            Image image = new Image();
                            image.setImageType(ImageType.DYNAMIC);
                            image.setIsTemplate(false);
                            image.setValue(mediaImage.getName());
                            mediaServiceData.setMediaImage(image);

                            AppServiceData appServiceData = new AppServiceData();
                            appServiceData.setServiceType(AppServiceType.MEDIA.toString());
                            appServiceData.setServiceID(serviceID);
                            appServiceData.setMediaServiceData(mediaServiceData);
                            onAppServiceData.setServiceData(appServiceData);

                            sdlManager.sendRPC(onAppServiceData);

Summary

• Added the mediaImage param to MediaServiceData

Changelog

Enhancements

• Added the mediaImage param to MediaServiceData

Tasks Remaining:

• Add param to RPC class
• Add tests

CLA

• I have signed the CLA

[codecov-io]

Codecov Report

Merging #1074 into develop will increase coverage by 0.04%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             develop   #1074      +/-   ##
============================================
+ Coverage      46.05%   46.1%   +0.04%     
- Complexity      3692    3694       +2     
============================================
  Files            433     433              
  Lines          20260   20263       +3     
  Branches        2190    2190              
============================================
+ Hits            9331    9342      +11     
+ Misses         10445   10435      -10     
- Partials         484     486       +2

Impacted Files	Coverage Δ	Complexity Δ
...om/smartdevicelink/proxy/rpc/MediaServiceData.java	100% <100%> (ø)	28 <2> (+2)	⬆️
...smartdevicelink/encoder/VirtualDisplayEncoder.java	28.97% <0%> (+4.54%)	8% <0%> (ø)	⬇️

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