Update Austin City Council Districts Overlay

[JaceDeloney]

Change the council district symbology on VZV from colors to a fill pattern and/or a dotted outline. e.g.: https://docs.mapbox.com/ios/maps/examples/fill-pattern/

Austin City Council Districts geofile can be found here: https://data.austintexas.gov/Locations-and-Maps/Council-Districts-Fill/hdpc-ysmz

• [x] Add info popover component to Austin City Council Districts overlay

[mddilley]

From @john: https://docs.google.com/presentation/d/1Fxtt7K10B7jYXszU-lMoffbJRB0ys9SSM1srbg9WQuA/edit?usp=sharing

• [x] ~Use mapshaper to reduce layer complexity~ Used SoQL function simplify_preserve_topology
• [x] Prune fields in API request