add new API in SQLiteStatement to deprecate another.

1. SQLIteStatement.executeUpdateDelete() replaces execute() - and returns the
number of rows changed.
2. let SQLiteDatabase.execSQL() call the above new API - which
means all CRUD statements by execSQL() are stored in prepared statement cache.
3. remove the following from SQLiteDatabase
     lastrowId
     lastchangecount()
     native_execSQL()

Change-Id: I4e93a09dc381f425c3ae6ccc331a7bf227491e22