framworks:fix ringtone duplicated in Clock and Phone ringtone

Summary:
There are two different name ogg file but have same title.
When first boot the phone, it will scan the media files, and
store their infomation to database for audio files, will call
native method parseOGG to parse file and get title, album
information etc. Because there are two file have same title,
so we can find two Cesium in the list of alarm ringtone

Modify AllAudio.mk ,do not copy same title file

CRs-Fixed: 535350

Change-Id: Ibda71c56fc763bb2292288c84889bfd1d38c0113

Test Plan: verified

Reviewers: randall.rushing, synergy

Reviewed By: synergy

Differential Revision: http://review.codefirex.com/D448