Add color deserialization for primitives and unions

PiperOrigin-RevId: 321652678

Author: lauraharker

src/com/google/javascript/jscomp/colors/PrimitiveColor.java

@@ -26,6 +26,7 @@ public enum PrimitiveColor implements Color {
   SYMBOL,
   NULL_OR_VOID,
   BIGINT,
+  BOOLEAN,
   // Equivalent to Closure '*'/'?' and TS unknown/any
   UNKNOWN;
 

src/com/google/javascript/jscomp/colors/UnionColor.java

@@ -26,7 +26,7 @@
 @AutoValue
 public abstract class UnionColor implements Color {
 
-  static UnionColor create(ImmutableSet<Color> alternates) {
+  public static UnionColor create(ImmutableSet<Color> alternates) {
     checkArgument(
         alternates.size() > 1,
         "UnionColor alternates should have more than one element, found %s",