Have WKUIDelegate._webViewLockScreenOrientation return a boolean so the client application can communicate if it was help to lock the orientation or not.
Pull request: https://github.com/WebKit/WebKit/pull/5397
Committed 255588@main (5ec7c256f77f): <https://commits.webkit.org/255588@main> Reviewed commits have been landed. Closing PR #5397 and removing active labels.
<rdar://problem/101209129>