Merged commit includes the following changes:

[yongzhe2160]

257930561 by yongzhe:

Mobile LSTD TfLite Client.

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257928126 by yongzhe:

Mobile SSD Tflite client.

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257921181 by menglong:

Fix discrepancy between pre_bottleneck = {true, false}

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257561213 by yongzhe:

File utils.

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257449226 by yongzhe:

Mobile SSD Client.

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257264654 by yongzhe:

SSD utils.

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257235648 by yongzhe:

Proto bazel build rules.

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256437262 by Menglong Zhu:

Fix check for FusedBatchNorm op to only verify it as a prefix.

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256283755 by yongzhe:

Bazel build and copybara changes.

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251947295 by yinxiao:

Add missing interleaved option in checkpoint restore.

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251513479 by yongzhe:

Conversion utils.

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248783193 by yongzhe:

Branch protos needed for the lstd client.

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248200507 by menglong:

Fix proto namespace in example config

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PiperOrigin-RevId: 257930561