Enforce minimum viewbox of size 4

[alexjlockwood]

If we want the min viewBox size to be 4, then maybe we should transform the pathData to ensure this precondition is met w/o affecting the scale of the image?

Example SVG:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg xmlns:svg="http://www.w3.org/2000/svg"
  xmlns="http://www.w3.org/2000/svg"
  version="1.0"
  width="600"
  height="600"
  viewBox="0 0 1 1"
  id="svg2">
  <defs id="defs3497" />
  <g transform="matrix(1.688625,0,0,1.688625,-0.404256,0.14628)"
    id="g6547">
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      fill="#000"
      id="path12" />
    <path d="M 0.71499522,0.000129127 L 0.71593272,0.000823567 L 0.71690493,0.001518007 L 0.71886673,0.003028414 L 0.72089796,0.004642987 L 0.72296392,0.006361726 L 0.7250646,0.00816727 L 0.72718265,0.010042258 L 0.72933541,0.01198669 L 0.73150554,0.013983205 L 0.73367566,0.016049164 L 0.73584578,0.018132484 L 0.74013395,0.02240329 L 0.74223463,0.024556054 L 0.74431795,0.026708818 L 0.74634919,0.028844221 L 0.74832834,0.030979624 L 0.76166159,0.045128839 C 0.76999487,0.053878783 0.78291146,0.052628791 0.79416138,0.055128775 L 0.79874469,0.055545439 C 0.81082794,0.062229424 0.80707797,0.075562672 0.80291133,0.085545247 L 0.80041134,0.091812568 C 0.78832809,0.12054502 0.75332831,0.12262834 0.72832847,0.1092951 L 0.71749521,0.1034618 L 0.71374523,0.1034618 L 0.70582862,0.10846177 L 0.69041205,0.12097905 C 0.65791226,0.10681247 0.63166242,0.090128551 0.61082922,0.067628695 L 0.65916225,0.006795751 L 0.67541214,-0.016537433 L 0.67874546,-0.024454049 L 0.68249543,-0.033186632 C 0.68249543,-0.033186632 0.69749534,-0.051953873 0.70624528,-0.048203897 C 0.71499522,-0.04443656 0.72041186,-0.028204025 0.71832854,-0.019870745 L 0.71582855,-0.009870809 L 0.71499522,0.000129127 L 0.71541189,0.000129127"
      fill="#000"
      id="path14" />
  </g>
</svg>

Same as romannurik/AndroidIconAnimator#116