title: Gradle build for Android in Unity fails, saying that it could not find intellij-core.jar
body: <p>So thats what I have tried:</p>
  <ul>
  <li>Building different projects (same thing)</li>
  <li>Reinstalling sdk, jdk, and Unity Editor (newbie gotos)</li>
  </ul>
  <p>I have also found very similar problem from today: <a href="https://stackoverflow.com/questions/52946371/android-studio-could-not-find-intellij-core-jar">Android Studio - Could not find intellij-core.jar</a>
  yet the only gradle.build file that I found was the one generated with Unity in Temp folder that overwrites itself after every build start.</p>
  <p>Unity 2018.2.13f1, Windows 10 x64, Fresh Android Studio 3.2.1, jdk1.8.0_192</p>
  <p><strong>Here is a console log:</strong> <br>
  Short</p>
  <pre>
  A problem occurred configuring root project 'gradleOut'.
  > Could not resolve all files for configuration ':classpath'.
     > Could not find intellij-core.jar (com.android.tools.external.com-intellij:intellij-core:26.0.1).
       Searched in the following locations:
           https://jcenter.bintray.com/com/android/tools/external/com-intellij/intellij-core/26.0.1/intellij-core-26.0.1.jar
  </pre>
  <p>Long</p>
  <pre>
  CommandInvokationFailure: Gradle build failed. 
  C:\Program Files\Java\jdk1.8.0_192\bin\java.exe -classpath "C:\Program Files (x86)\Unity Editors\2018.2.13f1\Editor\Data\PlaybackEngines\AndroidPlayer\Tools\gradle\lib\gradle-launcher-4.2.1.jar" org.gradle.launcher.GradleMain "-Dorg.gradle.jvmargs=-Xmx2048m" "assembleRelease"
  
  stderr[
  
  FAILURE: Build failed with an exception.
  
  * What went wrong:
  A problem occurred configuring root project 'gradleOut'.
  > Could not resolve all files for configuration ':classpath'.
     > Could not find intellij-core.jar (com.android.tools.external.com-intellij:intellij-core:26.0.1).
       Searched in the following locations:
           https://jcenter.bintray.com/com/android/tools/external/com-intellij/intellij-core/26.0.1/intellij-core-26.0.1.jar
  
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  
  * Get more help at https://help.gradle.org
  
  BUILD FAILED in 1s
  ]
  stdout[
  
  ]
  exit code: 1
  UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
  UnityEditor.Android.Command.Run (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
  UnityEditor.Android.AndroidJavaTools.RunJava (System.String args, System.String workingdir, System.Action`1 progress, System.String error)
  UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action`1 progress)
  Rethrow as GradleInvokationException: Gradle build failed
  UnityEditor.Android.GradleWrapper.Run (UnityEditor.Android.AndroidJavaTools javaTools, System.String workingdir, System.String task, System.Action`1 progress)
  UnityEditor.Android.PostProcessor.Tasks.BuildGradleProject.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context)
  UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context)
  UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)
  </pre>