[FEATURE] Stored/known contacts ignore blocked keywords

[sudoshindo]

[FEATURE] Stored/known contacts ignore blocked keywords

[sudoshindo]

Updated sample code, less confusing if-statement structure.
Updated text in "Additional information" section.

[tve]

the fact that messages from my contacts are blocked because they match a keyword is baffling to me. I don't want messages from contacts blocked, it makes the keyword list almost useless. In other words: +1 for this feature.

[sudoshindo]

I have no idea how this will affect alphanumeric Sender IDs though. Like when you receive a message from your network provider and the sender isn't a number but it automatically has its own name even if it's not a saved in your contacts.

IDK if Android treats that as known or unknown.