feat: Add extension for creating data from data url

[jcesarmobile]

This allows plugins to create Data from both a base64 string (i.e. SGVsbG8sIFdvcmxkIQ==) or a base64 encoded url (i.e. data:text/plain;base64,SGVsbG8sIFdvcmxkIQ==)
Current Data(base64Encoded: base64string)only allows the first, but fails with the second and there are a few plugins that accept both.
Instead of using the getCleanData that strips the data part from the string, and then converts it to Data, this handles both things on a single call.
To be used like Data.capacitor.data(base64EncodedOrDataUrl: dataStringFromPlugin)