[Do Not Submit] Rough draft enabling junit tests for android studio

build/android/gradle/build.gradle.jinja

 {# Copyright 2016 The Chromium Authors. All rights reserved. #}
 {# Use of this source code is governed by a BSD-style license that can be #}
 {# found in the LICENSE file. #}
 // Generated by //build/android/generate_gradle.py
 {% if template_type == 'root' %}
 
 buildscript {
     repositories {
         jcenter()
     }
@@ skipping 62 matching lines @@
 {% endfor %}
 {% for proj in java_project_deps %}
     compile project(":{{ proj }}")
 {% endfor %}
 {% for proj in android_project_deps %}
     debugCompile project(path: ":{{ proj }}", configuration: "debug")
     releaseCompile project(path: ":{{ proj }}", configuration: "release")
 {% endfor %}
 }
 
+{% if template_type != 'java_library' %}
 afterEvaluate {
     def tasksToDisable = tasks.findAll {
         return (it.name.equals('generateDebugSources')  // causes unwanted AndroidManifest.java
                 || it.name.equals('generateReleaseSources')
                 || it.name.endsWith('Assets')
                 || it.name.endsWith('BuildConfig')  // causes unwanted BuildConfig.java
 {% if not use_gradle_process_resources %}
                 || it.name.endsWith('Resources')
                 || it.name.endsWith('ResValues')
 {% endif %}
                 || it.name.endsWith('Aidl')
                 || it.name.endsWith('Renderscript')
                 || it.name.endsWith('Shaders'))
     }
     tasksToDisable.each { Task task ->
       task.enabled = false
     }
 }
+{% endif %}
 
 {% endif %}