add back Buildings.json

Author: hallahan

app/src/main/assets/constraints/Buildings.json

@@ -0,0 +1,25 @@
+{
+  "addr:city": {
+    "default": "Sacramento",
+    "required": true,
+    "custom_value": true
+  },
+  "addr:housenumber": {
+    "numeric": true
+  },
+  "addr:state": {
+    "default": "CA",
+    "required": true
+  },
+  "addr:street": {
+    "required": true
+  },
+  "building": {
+    "required": true
+  },
+  "name": {
+    "hide_if": {
+      "building": "house"
+    }
+  }
+}