LP1895395: Use Angular AOT compiler for ng build

LP1895395: Use Angular AOT compiler for ng build

As of angular 9, the angular documentation recommends using the AOT
compiler for ng build: https://angular.io/guide/ivy

This would provide a bit more consistency for developers (since some
errors only display in AOT, others only display in JIT, and we want to
make sure that the AOT in particular is error-free so that builds don't
break).

Signed-off-by: Jane Sandberg <sandbej@linnbenton.edu>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>