fix(gax): make FakePagedApi inner classes public to fix compilation error

[diegomarquezp]

This PR fixes a compilation error in PagingTest where FakePagedApi.ListIntegersSizedPage was reported as having private access.

In FakePagedApi.java, ListIntegersSizedPage and ListIntegersPage were declared as private static class. However, they were used as type parameters in the public class ListIntegersPagedResponse. This exposure of private types via public type parameters caused compilation failures in stricter compiler environments (as seen in the CI failure).

Changes

• Changed visibility of ListIntegersPage and ListIntegersSizedPage from private to public in FakePagedApi.java.

Verification Results

• Compilation: Verified that mvn test-compile -pl sdk-platform-java/gax-java/gax succeeds.

[blakeli0]

I don't think we should make this change. This class has existed for a while and we didn't run into any issues. I think it is because the build infra messed up somewhere after monorepo migration.

[diegomarquezp]

SG, I'll backtrack and find the origin of this problem. Thanks for the quick review.

[gemini-code-assist]

Code Review

This pull request modifies the visibility of the ListIntegersPage and ListIntegersSizedPage static inner classes in FakePagedApi.java, changing them from private to public. I have no feedback to provide.