Revert "CaptivePortalData: use CharSequence in VenueFriendlyName API"

This reverts commit eae3a9e4e3c93b56392edae4f3370322fb36c2c7.

Reason for revert: b/183174863
Bug: 183174863

Change-Id: I4db923e112bba149f4e8eb4cfa8c3f97defd5e63
3 files changed