chore(json-update): latest json files

This also adds a usable version of the genomics API, which was empty
previously (and if I recall correctly).

etc/api/discovery/v1/discovery-api.json

@@ -1,6 +1,6 @@
 {
  "kind": "discovery#restDescription",
- "etag": "\"ye6orv2F-1npMW3u9suM3a7C5Bo/rJ-Wlqqs_yJDjtCFAIylPtmqXPY\"",
+ "etag": "\"ye6orv2F-1npMW3u9suM3a7C5Bo/jn2m36Cyj5Ei-KQXTI8Znl-wUic\"",
  "discoveryVersion": "v1",
  "id": "discovery:v1",
  "name": "discovery",
@@ -344,6 +344,10 @@
      "description": "The ETag for this response.",
      "readOnly": true
     },
+    "exponentialBackoffDefault": {
+     "type": "boolean",
+     "description": "Enable exponential backoff for suitable methods in the generated clients."
+    },
     "features": {
      "type": "array",
      "description": "A list of supported features for this API.",