[TIMOB-3380] Android: PRAGMA statements that set data don't work

On android, when running the following select statement: "PRAGMA user_version=5;" the user_version is never updated. The same statement works fine when manually ran through sqlite3. I've looked into the code in TiDatabaseProxy.java and it seems that any pragma statements are automatically put through the rawQuery function, which shouldn't be used for queries that insert data. Seems that the fix for ticket TIMOB-2147 probably introduced this issue. I've attached a patch that I think should fix the issue, although I've not tested it yet as I don't have a proper build environment set up for titanium mobile.