Added note regarding libc++_shared.so in the bind-native-code docs

[zeyus]

Description of what this PR is changing or adding, and why:

This adds a section detailing the requirements and bundling of the libc++_shared.so library for Android native packages and libraries that require it. See also: dart-lang/native#2099 (comment) and https://pub.dev/packages/android_libcpp_shared

This PR follows on from the discussion with @dcharkes in the above issue.

Issues fixed by this PR (if any):

PRs or commits this PR depends on (if any):

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• If this PR is not meant to land until a future stable release, mark it as draft with an explanation.
• This PR follows the Google Developer Documentation Style Guidelines—for example, it doesn't use i.e. or e.g., and it avoids I and we (first-person pronouns).
• This PR uses semantic line breaks
  of 80 characters or fewer.

[gemini-code-assist]

Code Review

This pull request adds a helpful note about libc++_shared.so on Android. The explanation is clear and provides useful links. I have one suggestion to improve formatting by adhering to the 80-character line limit for markdown files, as mentioned in the project's style guide.

[sfshaza2]

/gcbrun

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 7702237):

https://flutter-docs-prod--pr13212-feature-android-libcpp-shar-3poj7jat.web.app