Update changes.md to include the removal of legacy indexing
Update changes.md to include the removal of legacy indexing

akhilesh0707/sync-android,nuan-nuan/sync-android,akhilesh0707/sync-android,cloudant/sync-android,nuan-nuan/sync-android,cloudant/sync-android,akhilesh0707/sync-android,nuan-nuan/sync-android