[native] update comm icon pack

Summary: This diff adds the following new icons to the CommIcon pack: pin, unpin, pin-mirror and etherium-outline. These changes were copy and pasted from files given to me by Ted.

Test Plan:
Please see the screenshots to see what the following icons look like

pin:

pin-mirror:

unpin:

etherium-outline:

Reviewers: ashoat, atul

Reviewed By: ashoat, atul

Subscribers: rohan, ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7458