update all json files

etc/api/driveactivity/v2/driveactivity-api.json

@@ -25,6 +25,7 @@
     }, 
     "id": "driveactivity:v2", 
     "kind": "discovery#restDescription", 
+    "mtlsRootUrl": "https://driveactivity.mtls.googleapis.com/", 
     "name": "driveactivity", 
     "ownerDomain": "google.com", 
     "ownerName": "Google", 
@@ -131,7 +132,7 @@
             }
         }
     }, 
-    "revision": "20190702", 
+    "revision": "20200407", 
     "rootUrl": "https://driveactivity.googleapis.com/", 
     "schemas": {
         "Action": {
@@ -283,6 +284,10 @@
             "description": "A comment with an assignment.", 
             "id": "Assignment", 
             "properties": {
+                "assignedUser": {
+                    "$ref": "User", 
+                    "description": "The user to whom the comment was assigned."
+                }, 
                 "subtype": {
                     "description": "The sub-type of this event.", 
                     "enum": [
@@ -543,7 +548,7 @@
                 }, 
                 "driveFolder": {
                     "$ref": "DriveFolder", 
-                    "description": "The Drive item is a folder."
+                    "description": "The Drive item is a folder. Includes information about the type of\nfolder."
                 }, 
                 "file": {
                     "$ref": "File", 
@@ -582,7 +587,7 @@
                 }, 
                 "driveFolder": {
                     "$ref": "DriveFolder", 
-                    "description": "The Drive item is a folder."
+                    "description": "The Drive item is a folder. Includes information about the type of\nfolder."
                 }, 
                 "file": {
                     "$ref": "File",