Revert of Fix android_junit_tests and add a GN target for them.

webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java

Index: webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java
diff --git a/webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java b/webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java
index 5ec2ac4d9074685ca4aad355f56a54b068f5da44..031cdfd5c961af59427cdb1be07c6dcd1ffd2de6 100644
--- a/webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java
+++ b/webrtc/androidjunit/src/org/webrtc/CameraEnumerationTest.java
@@ -15,9 +15,9 @@
 
 import org.webrtc.CameraEnumerationAndroid.CaptureFormat.FramerateRange;
 
-import org.chromium.testing.local.LocalRobolectricTestRunner;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
 import org.robolectric.annotation.Config;
 
 import java.util.Arrays;
@@ -25,7 +25,7 @@
 /**
  * Tests for CameraEnumerationAndroid.
  */
-@RunWith(LocalRobolectricTestRunner.class)
+@RunWith(RobolectricTestRunner.class)
 @Config(manifest = Config.NONE)
 public class CameraEnumerationTest {
   @Test