Setup entire state needed to load previous imageCaptureResult

[eschramm]

Fixes https://github.com/CareEvolution/MyDataHelps-iOS/issues/1347.

Testing (through MyDataHelps)

Using the following 2 surveys (for both versions of ResearchKit) perform the following steps - may need to open disclosure triangle to see survey JSON

1. Capture image with camera
2. Advance to the next step
3. Hit the back button to go to the previous step (Image Capture)
4. Verify the image taken previously shows as expected
5. Verify the image can be recaptured
6. Complete the survey - verify image saved with survey is as expected

Example Survey - Version 1

{
  "type": "RKStudioOrderedTask",
  "name": "Survey",
  "identifier": "Survey",
  "steps": [
    {
      "type": "ImageCaptureStep",
      "text": "",
      "title": "",
      "identifier": "ImageCapture",
      "captureRaw": false
    },
    {
      "type": "InstructionStep",
      "text": "After capturing the image, navigate back to the previous Image Capture Step and verify the image you captured just now appears as one would expect.",
      "title": "Now Back it Up",
      "identifier": "Instructions",
    }
  ],
  "styles": {
    "progressBarColor": "#5381c3",
    "nextButtonBackgroundColor": "#5381c3",
    "nextButtonTextColor": "#FFFFFF"
  }
}

Example Survey - Version 2

{
  "type": "RKStudioOrderedTask",
  "name": "Survey",
  "identifier": "Survey",
  "rkVersion": 2,
  "steps": [
    {
      "type": "ImageCaptureStep",
      "text": "",
      "title": "",
      "identifier": "ImageCapture",
      "captureRaw": false
    },
    {
      "type": "InstructionStep",
      "text": "After capturing the image, navigate back to the previous Image Capture Step and verify the image you captured just now appears as one would expect.",
      "title": "Now Back it Up",
      "identifier": "Instructions",
    }
  ],
  "styles": {
    "progressBarColor": "#5381c3",
    "nextButtonBackgroundColor": "#5381c3",
    "nextButtonTextColor": "#FFFFFF"
  }
}

[mmertsock]

LGTM 🚢