title: Corresponding group ID not added to the process of the application
body: <p>Adb command <code>adb shell dumpsys package com.hackerli.girl</code> can help me get application info.</p>
  
  <p>Before I request <code>android.permission.WRITE_EXTERNAL_STORAGE</code>  permission, my app has a <code>gids=[3003]</code>. </p>
  
  <pre><code>requested permissions:
    android.permission.INTERNET
    android.permission.WRITE_EXTERNAL_STORAGE
    android.permission.READ_EXTERNAL_STORAGE
    android.permission.ACCESS_NETWORK_STATE
  install permissions:
    android.permission.INTERNET: granted=true
    android.permission.ACCESS_NETWORK_STATE: granted=true
  User 0: ceDataInode=1531967 installed=true hidden=false suspended=false stopped=true notLaunched=false enabled=0
    gids=[3003]
    runtime permissions:
  User 999: ceDataInode=0 installed=false hidden=false suspended=false stopped=true notLaunched=true enabled=0
    gids=[3003]
    runtime permissions:
  </code></pre>
  
  <p>After runtime permission <code>android.permission.WRITE_EXTERNAL_STORAGE</code> is granted, I get below info.</p>
  
  <pre><code>requested permissions:
    android.permission.INTERNET
    android.permission.WRITE_EXTERNAL_STORAGE
    android.permission.READ_EXTERNAL_STORAGE
    android.permission.ACCESS_NETWORK_STATE
  install permissions:
    android.permission.INTERNET: granted=true
    android.permission.ACCESS_NETWORK_STATE: granted=true
  User 0: ceDataInode=1531967 installed=true hidden=false suspended=false stopped=false notLaunched=false enabled=0
    gids=[3003]
    runtime permissions:
      android.permission.READ_EXTERNAL_STORAGE: granted=true
      android.permission.WRITE_EXTERNAL_STORAGE: granted=true
  User 999: ceDataInode=0 installed=false hidden=false suspended=false stopped=true notLaunched=true enabled=0
    gids=[3003]
    runtime permissions:
  </code></pre>
  
  <p>As you see, <code>READ_EXTERNAL_STORAGE</code> permission is also granted since it belongs to as same group as <code>WRITE_EXTERNAL_STORAGE</code>. <strong>However the <code>gids</code> is not changed. I think it should be updated so is there anything I mistake?</strong></p>