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    Because Sprout has removable storage, the framework needs to maintain
    external database for keeping multiple databases between SD cards.
    When cleaning up databases for old external storage volumes, we can't
    delete .db-shm and .db-wal because these two files always have the
    latest data and .db doesn't have. Using camera or Google+ will access
    .db-shm and .db-wal to get the latest data and will cause SQLite Disk
    I/O exception if they are deleted.

    The fix is to modify the logic of cleaning up databases (only delete
    .db file, not to delete .db-shm and .db-wal file).

    Bug 18412563

    Review: https://partner-android-review.git.corp.google.com/#/c/187072

Signed-off-by: Benson Huang <benson.huang@mediatek.com>

Change-Id: I484bd535ddebee09824a10f12241f6b2ce086b94