Fix issues around SQLite
* Fix the issue that SQLiteDatabase.openDatabase does not create new SQLite file.
* Fix the issue that SQLiteDatabase.getDatabase does not respect Context.getDatabasePath().
* Fix the issue that version is not set for database.
* Fix test cases accordingly.
Added test case for checking data persistency after closing db.
Added test case for checking if database is open after closing and opening again.
Merge pull request #654 from thorikawa/fix_sqlite_issues

Fix issues around SQLite