Proto commits in google-research/tensor2robot

These 8 commits are when the Protocol Buffers files have changed:

Commit:034f49c
Author:Tensor2Robot Team
Committer:Copybara-Service

Added pytype None checks to tensorspec_utils.py. PiperOrigin-RevId: 664847062

The documentation is generated from this commit.

Commit:25cc67c
Author:Rebecca Chen
Committer:Copybara-Service

Silence some pytype errors. PiperOrigin-RevId: 527992479

Commit:2509a1c
Author:Paul Wohlhart
Committer:Copybara-Service

Address deprecation warnings in tensorspec_utils. PiperOrigin-RevId: 427539013

Commit:5b3c954
Author:Paul Wohlhart
Committer:Copybara-Service

internal change. PiperOrigin-RevId: 352681379

Commit:3ab8aa5
Author:Alex Irpan
Committer:Copybara-Service

Support deferred decoding of images. Modify meta_learning reshaping to support dynamic shapes. Add random subsampling util. PiperOrigin-RevId: 291050120

Commit:9b23a19
Author:Tensor2Robot Team
Committer:Copybara-Service

internal change PiperOrigin-RevId: 266709812

Commit:17d55f7
Author:Daniel Kappler
Committer:Copybara-Service

Introduce varlen_default_value to ExtendedTensorSpec to allow automatic padding and variable specs. PiperOrigin-RevId: 263406134

Commit:5a27cc8
Author:Daniel Kappler
Committer:Copybara-Service

Switch all assets for t2r to proto to avoid issues with breaking checkpoints. PiperOrigin-RevId: 252753633