Update Eclipse classpath and documentation for running JUnit tests.

tools/android/eclipse/.classpath

Index: tools/android/eclipse/.classpath
diff --git a/tools/android/eclipse/.classpath b/tools/android/eclipse/.classpath
index 3a0c57c8293f657582a7d19551a960292f50a8cf..bf2e6111c97826e0afe57f7b438eae684a378fa7 100644
--- a/tools/android/eclipse/.classpath
+++ b/tools/android/eclipse/.classpath
@@ -123,9 +123,6 @@ to the classpath for downstream development. See "additional_entries" below.
     <classpathentry kind="src" path="third_party/leakcanary/src/leakcanary-android/src/main/java"/>
     <classpathentry kind="src" path="third_party/leakcanary/src/leakcanary-watcher/src/main/java"/>
     <classpathentry kind="src" path="third_party/mockito/src/src/main/java"/>
-    <classpathentry kind="src" path="third_party/robolectric/robolectric/robolectric-annotations/src/main/java"/>
-    <classpathentry kind="src" path="third_party/robolectric/robolectric/robolectric-resources/src/main/java"/>
-    <classpathentry kind="src" path="third_party/robolectric/robolectric/robolectric-shadows/shadows-multidex/src/main/java"/>
     <classpathentry kind="src" path="tools/android/findbugs_plugin/src"/>
     <classpathentry kind="src" path="tools/android/findbugs_plugin/test/java/src"/>
     <classpathentry kind="src" path="tools/android/memconsumer/java/src"/>
@@ -297,9 +294,12 @@ to the classpath for downstream development. See "additional_entries" below.
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/cacheinvalidation/cacheinvalidation_proto_java.jar"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/cardboard-java/cardboard-java.jar"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/gif_player/gif_player_java.jar"/>
+    <classpathentry kind="lib" path="out/Debug/lib.java/third_party/guava/guava-20.0.jar"/>
+    <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/robolectric_annotations_java.jar" sourcepath="third_party/robolectric/robolectric/robolectric-annotations/src/main/java"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/robolectric_java.jar" sourcepath="third_party/robolectric/robolectric/robolectric/src/main/java"/>
+    <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/robolectric_resources_java.jar" sourcepath="third_party/robolectric/robolectric/robolectric-resources/src/main/java"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/robolectric_utils_java.jar" sourcepath="third_party/robolectric/robolectric/robolectric-utils/src/main/java"/>
-    <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/shadows-core-3.0-21.jar" sourcepath="third_party/robolectric/robolectric/robolectric-shadows/shadows-core/src/main/java"/>
+    <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/shadows-core-3.2.jar" sourcepath="third_party/robolectric/robolectric/robolectric-shadows/shadows-core/src/main/java"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/robolectric/shadows-multidex-3.0.jar" sourcepath="third_party/robolectric/robolectric/robolectric-shadows/shadows-multidex/src/main/java"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/third_party/WebKit/public/blink_headers_java.jar"/>
     <classpathentry kind="lib" path="out/Debug/lib.java/ui/accessibility/ui_accessibility_java.jar"/>