title: No cached version of com.android.tools.build:gradle:3.3 available for offline mode
body: <p>I did download gradle-3.3-all.zip from <a href="https://services.gradle.org/distributions/" rel="noreferrer">here</a>, and extract that to <code>C:\Program Files\Android\Android Studio\gradle\gradle-3.3\</code></p>
  
  <p>In Android Studio <code>File&gt;Settings&gt;Build, Execution,...&gt;Build Tools&gt;Gradle</code>
  I changed setting to 'Use Local Gradle Distribution' and 'Gradle Home Path' changed to <code>C:\Program Files\Android\Android Studio\gradle\gradle-3.3</code> and Offline Work in Global Gradle settings checked!</p>
  
  <p>but this gradle error occur during build :</p>
  
  <blockquote>
    <p>Error:No cached version of com.android.tools.build:gradle:3.3
    available for offline mode.</p>
  </blockquote>
  
  <p>Also when I change the offline work to unchecked this error occur :</p>
  
  <blockquote>
    <p>Error:Could not GET
    '<a href="https://repo1.maven.org/maven2/com/android/tools/build/gradle/3.3/gradle-3.3.pom" rel="noreferrer">https://repo1.maven.org/maven2/com/android/tools/build/gradle/3.3/gradle-3.3.pom</a>'. Received status code 407 from server: Proxy Authentication Required</p>
  </blockquote>
  
  <p>Also this path <code>https://repo1.maven.org/maven2/com/android/tools/build/gradle/</code> 
  does not contain gradle 3.3</p>
  
  <p>what is my mistake?</p>