fix: 🐛 memory access out of range on resize

[theashraf]

Problem:
The resize method in LottieRenderer creates a new Picture every time called causing memory out of access as it returns a new Picture instance, not the same Picture instance associated with the current Animation created on load.

Fix:

• Maintain a thorvg_picture property in the LottieRenderer, and use the same thorvg_picture created on load when resizing.
• Resize the buffer instead of allocating a new one in memory to maintain it's raw pointer address in memory during the lifetime of the LottieRenderer

[changeset-bot]

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Latest commit: 78ccf4f

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[afsalz]

Looks okay 🚀 android is working fine now.