Revert "DownloadProvider: add to support download into sdcard storage"

This reverts commit 9215f60b48895f033c34bcbbf522f2568c24cd5e.

Change-Id: Ia8eba04ae557c32322463fedc418ce1ef4846d4d
Revert "Avoid leaking cursors"

This reverts commit 09020e27592900f5eb261747a80c8dce7dfe141c.

Change-Id: I63bdabeae5c3c26b5f7dd129cd03f90a981ffdc8