Add missing available guard to RCTInputAccessoryViewContent

[benoitdion]

Summary

The new podspec includes all .h and .m files, RCTInputAccessoryViewContent was missing a tvOS guard.

Changelog

[iOS] [Fixed] - Restore RCTText tvOS pod compatibility

Test Plan

Build RCTText for tvOS

[facebook-github-bot]

Thank you for your pull request and welcome to our community. We require contributors to sign our Contributor License Agreement, and we don't seem to have you on file. In order for us to review and merge your code, please sign up at https://code.facebook.com/cla. If you are contributing on behalf of someone else (eg your employer), the individual CLA may not be sufficient and your employer may need the corporate CLA signed.

If you have received this in error or have any questions, please contact us at [email protected]. Thanks!

[pull-bot]

	Messages
📖	📋 Missing Test Plan - Can you add a Test Plan? To do so, add a "## Test Plan" section to your PR description. A Test Plan lets us know how these changes were tested.

Generated by 🚫 dangerJS against 1c16f20

[facebook-github-bot]

Thank you for signing our Contributor License Agreement. We can now accept your code for this (and any) Facebook open source project. Thanks!

[cpojer]

Thank you for the PR!

[facebook-github-bot]

@cpojer is landing this pull request. If you are a Facebook employee, you can view this diff on Phabricator.

[react-native-bot]

This pull request was successfully merged by @benoitdion in 5f53cb0.

^{When will my fix make it into a release? | Upcoming Releases}