fun depotQuoteWithSymbol(symbol: String): LiveData<DepotQuote>
Returns the DepotQuote with the matching id, wrapped in LiveData. Conflates all DepotQuotePurchases with the matching id and returns them as one DepotQuote, whereby the amount Double is added up and the mean buyingPrice Double is bid from the buyingPrices Double.
symbol - The DepotQuotePurchase symbol used for the database query.
Return
LiveData containing the DepotQuote.