Add a filter option to block instead of empty response

[bbondy]

Description

Some websites respond better when you block explicitly instead of a 200 OK.
Once example is www.wsj.com videos.
Sending a 200 OK with empty content keeps doing the imasdk resopnse in a loop.
Instead adding code to always block it would be ideal.

Steps to Reproduce

1. Go to www.wsj.com
2. Play a video

Actual result:

Spins forever

Expected result:

Plays the video.

Reproduces how often:

Always

Brave version (brave://version info)

All currently released (0.61.x is on Release channel at the time of this writing)

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds? yes

Website problems only:

• Does the issue resolve itself when disabling Brave Shields? yes
• Is the issue reproducible on the latest version of Chrome? no