feat(testing): update the API

#### testing:v1

The following keys were added:
- schemas.AndroidRoboTest.properties.roboMode.description
- schemas.AndroidRoboTest.properties.roboMode.enum
- schemas.AndroidRoboTest.properties.roboMode.enumDescriptions
- schemas.AndroidRoboTest.properties.roboMode.type

The following keys were changed:
- schemas.TestSetup.properties.systrace.description

discovery/testing-v1.json

@@ -282,7 +282,7 @@
       }
     }
   },
-  "revision": "20210326",
+  "revision": "20210719",
   "rootUrl": "https://testing.googleapis.com/",
   "schemas": {
     "Account": {
@@ -589,6 +589,20 @@
           },
           "type": "array"
         },
+        "roboMode": {
+          "description": "The mode in which Robo should run. Most clients should allow the server to populate this field automatically.",
+          "enum": [
+            "ROBO_MODE_UNSPECIFIED",
+            "ROBO_VERSION_1",
+            "ROBO_VERSION_2"
+          ],
+          "enumDescriptions": [
+            "LINT.IfChange This means that the server should choose the mode. Recommended.",
+            "Runs Robo in UIAutomator-only mode without app resigning",
+            "Runs Robo in standard Espresso with UIAutomator fallback"
+          ],
+          "type": "string"
+        },
         "roboScript": {
           "$ref": "FileReference",
           "description": "A JSON file with a sequence of actions Robo should perform as a prologue for the crawl."
@@ -1980,7 +1994,7 @@
         },
         "systrace": {
           "$ref": "SystraceSetup",
-          "description": "Systrace configuration for the run. If set a systrace will be taken, starting on test start and lasting for the configured duration. The systrace file thus obtained is put in the results bucket together with the other artifacts from the run."
+          "description": "Deprecated: Systrace uses Python 2 which has been sunset 2020-01-01. Support of Systrace may stop at any time, at which point no Systrace file will be provided in the results. Systrace configuration for the run. If set a systrace will be taken, starting on test start and lasting for the configured duration. The systrace file thus obtained is put in the results bucket together with the other artifacts from the run."
         }
       },
       "type": "object"

src/apis/testing/v1.ts

@@ -348,6 +348,10 @@ export namespace testing_v1 {
      * A set of directives Robo should apply during the crawl. This allows users to customize the crawl. For example, the username and password for a test account can be provided.
      */
     roboDirectives?: Schema$RoboDirective[];
+    /**
+     * The mode in which Robo should run. Most clients should allow the server to populate this field automatically.
+     */
+    roboMode?: string | null;
     /**
      * A JSON file with a sequence of actions Robo should perform as a prologue for the crawl.
      */
@@ -1279,7 +1283,7 @@ export namespace testing_v1 {
      */
     networkProfile?: string | null;
     /**
-     * Systrace configuration for the run. If set a systrace will be taken, starting on test start and lasting for the configured duration. The systrace file thus obtained is put in the results bucket together with the other artifacts from the run.
+     * Deprecated: Systrace uses Python 2 which has been sunset 2020-01-01. Support of Systrace may stop at any time, at which point no Systrace file will be provided in the results. Systrace configuration for the run. If set a systrace will be taken, starting on test start and lasting for the configured duration. The systrace file thus obtained is put in the results bucket together with the other artifacts from the run.
      */
     systrace?: Schema$SystraceSetup;
   }