Set HAS_CONTENT field from the app after writing audio content.

In change-id I93e4b467acdefe339fa70dd751ea05f195c32e71 content voicemail
content provider was modified to no more automatically set the
has_content field. The app now needs to set this field itself after
writing the content.

bug: 5147190
Change-Id: If3c66a86803f7587677c2ec09965b89f31f6268e
3 files changed