[FloatingActionButton] Fix the width calculation in the wrap_content extend strategy

[pubiqq]

Fixes #4630.

[kendrickumstattd]

We appreciate the effort you've put into this. Our current focus is on resolving critical bugs. Because this PR introduces a change that isn't related to a bug fix, we don't have the capacity to properly test and integrate it. We hope you understand. If this is, in fact, a bug fix, please feel free to re-open.

[pubiqq]

Because this PR introduces a change that isn't related to a bug fix, we don't have the capacity to properly test and integrate it. We hope you understand. If this is, in fact, a bug fix, please feel free to re-open.

It's a bugfix (see #4596 (comment)), please reopen the PR.

[manabu-nakamura]

Our current focus is on resolving critical bugs. Because this PR introduces a change that isn't related to a bug fix, we don't have the capacity to properly test and integrate it. We hope you understand. If this is, in fact, a bug fix, please feel free to re-open.

Even in such a situation, I don't think it's necessary to close this PR.