TFLite-Runtime now LiteRT

[roablep]

Per https://developers.googleblog.com/en/tensorflow-lite-is-now-litert/

import tflite_runtime.interpreter as tflite --> import ai_edge_litert.interpreter as tflite

Maybe something as simple as this?

try:
    # Attempt to import the newer LiteRT runtime
    import ai_edge_litert.interpreter as tflite
except ImportError:
    try:
        # Fallback to the original tflite_runtime if LiteRT is unavailable
        import tflite_runtime.interpreter as tflite
    except ImportError:
        raise ImportError("Neither LiteRT nor TensorFlow Lite runtime found. Please install `ai_edge_litert` or `tflite_runtime`.")