bufferSize must be >= 0

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What language does this apply to?
Java

If it's a proto syntax change, is it for proto2 or proto3?
proto3

If it's about generated code change, what programming language?
Java

Describe the problem you are trying to solve.

The current type for serializedSize is int, which has a size limit of 2,147,483,648. For a larger sized data, it will throw out
bufferSize must be >= 0 during serialization.

Describe the solution you'd like

instead of

    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;
...

Can we change to long

    public int getSerializedSize() {
      **long** size = memoizedSize;
      if (size != -1) return size;
...

Describe alternatives you've considered

Additional context
Add any other context or screenshots about the feature request here.

[ObsidianMinor]

This is a constraint imposed by the protobuf format. A length-delimited value's length is an int32, so this can't be changed without breaking the format.