[DO NOT MERGE] Add aosp config for winscope

- config redirects searches to stub folder for unavailable traces

Bug: 148409169
Test: builds and opens traces in AOSP
Change-Id: I5775d732de64c2e66ed35a04bf868f2aee883add

tools/winscope/package.json

@@ -5,8 +5,8 @@
   "author": "Adrian Roos <roosa@google.com>",
   "private": true,
   "scripts": {
-    "dev": "cross-env NODE_ENV=development webpack-dev-server --open --hot",
-    "build": "cross-env NODE_ENV=production webpack --progress --hide-modules"
+    "dev": "cross-env AOSP=true NODE_ENV=development webpack-dev-server --open --hot",
+    "build": "cross-env AOSP=true NODE_ENV=production webpack --progress --hide-modules"
   },
   "dependencies": {
     "vue": "^2.3.3",