Revert "audio: ID3 tags of most chinese songs display messy"

This reverts commit b8c58116.

This change causes encoding issues if one has files in a non-UTF8
encoding and uses en_US locale. For details, refer to the JIRA ticket.

JIRA: CYAN-3511
Change-Id: I64751297283038b570cce1eec173f3fbc08db83f