Lottie/slot: multiple properties in single slot not working

[tinyjin]

if the slotJson has more than two properties, only first sid is overridden .
We might need to support overriding all from each slot.

{
  "ball_color": {
    "p": {
      "a": 0,
      "k": [
        0.1,
        1,
        0.5,
        1
      ]
    }
  },
  "background_color": { // ignored
    "p": {
      "a": 0,
      "k": [
        1,
        1,
        1,
        1
      ]
    }
  }
}

Should add looping condition it works until all sid is consumed in bool LottieLoader::override(const char* slot) in tvgLottieLoader.cpp