Bug 1760833: Update Firefox logo on MS store. r=nalexander

According to https://docs.microsoft.com/en-us/windows/apps/design/style/app-icons-and-logos and https://docs.microsoft.com/en-ca/windows/mixed-reality/distribute/submitting-an-app-to-the-microsoft-store, both the Square150x150 icons and LargeTile icons are potentially used in the Microsoft Store listing.

These new icons were generated by Visual Studio with the following settings:
* Bicubic Scaling Mode
* Turning _off_ recommended padding (I believe this is why the logo shows up so small in the Store)
* No color conversion

I did this for both the Medium Tile and Large Tile assets, and used the icon attached to bug as the source (which is 1024x1024).

Once landed, I intend to uplift this patch to Beta and verify the new Store listing there - and then it can ride to release with the next set of uplifts.

Differential Revision: https://phabricator.services.mozilla.com/D141784