title: Building apk by expo is not installing on android
body: <p>I have study how develope apps for android by using react-native. I was make simple app like "Hellow World", and build it in expo.</p>
  
  <p>From command line I was run:</p>
  
  <pre><code>exp build:android
  We've built a brand new CLI for Expo!
  Expo CLI is a drop in replacement for exp.
  Install: npm install -g expo-cli
  Use: expo --help
  Read more: https://blog.expo.io/expo-cli-2-0-released-a7a9c250e99c
  [19:07:57] Checking if current build exists...
  
  [19:07:59] No currently active or previous builds for this project.
  [19:08:01] Publishing to channel 'default'...
  [19:08:03] Building iOS bundle
  [19:08:04] Building Android bundle
  [19:08:04] Analyzing assets
  [19:08:06] Uploading assets
  [19:08:06] No assets to upload, skipped.
  [19:08:06] Processing asset bundle patterns:
  [19:08:06] - /home/xxx/projects/wtf/assets/*
  [19:08:06] Uploading JavaScript bundles
  [19:08:09] Published
  [19:08:09] Your URL is
  
  https://exp.host/xxx/wtf
  
  [19:08:09] Building...
  [19:08:10] Build started, it may take a few minutes to complete.
  [19:08:10] You can check the queue length at
   https://expo.io/turtle-status
  
  [19:08:10] You can monitor the build at
  
   https://expo.io/builds/4eb3dae0-d227-4732-a6db-1a1953a79b0d
  
  |[19:08:10] Waiting for build to complete. You can press Ctrl+C to exit.
  [19:25:21] Successfully built standalone app:
  </code></pre>
  
  <p>And application was build well. I was download apk from Expo site, and try to install on android. When it was installing, I get error with message like this:</p>
  
  <h1>Play Security could not find developer information. Applications from unknown developers may not be safe.</h1>
  
  <p>Attention question. How can I make my application secure? I could not find information about this. So that it is installed without disabling android protection.</p>
  
  <p>My app.json looks like:</p>
  
  <pre><code>{
    "expo": {
      "name": "wtf",
      "slug": "wtf",
      "privacy": "public",
      "sdkVersion": "34.0.0",
      "platforms": [
        "ios",
        "android",
        "web"
      ],
      "version": "1.0.0",
      "orientation": "portrait",
      "icon": "./assets/icon.png",
      "splash": {
        "image": "./assets/splash.png",
        "resizeMode": "contain",
        "backgroundColor": "#ffffff"
      },
      "updates": {
        "fallbackToCacheTimeout": 0
      },
      "assetBundlePatterns": [
        "assets/*"
      ],
      "ios": {
        "supportsTablet": true
      },
      "android": {
        "package": "com.wtf.wtf"
      }
    }
  }
  
  </code></pre>
  
  <p>Waiting for the application to install on android.</p>