PMD: Re-enable on test files

This used to be the case, which is why only minimal changes were
required to bring it back. This also makes it take the same files that
checkstyle does, which is more consistent.

app/src/androidTest/java/android/test/ProviderTestCase2MockContext.java

@@ -27,6 +27,9 @@ import android.os.Build;
 import android.test.mock.MockContentResolver;
 import android.test.mock.MockContext;
 
+import org.junit.After;
+import org.junit.Before;
+
 import java.io.File;
 
 /**
@@ -132,6 +135,7 @@ public abstract class ProviderTestCase2MockContext<T extends ContentProvider> ex
      * @throws Exception
      */
     @Override
+    @Before
     protected void setUp() throws Exception {
         super.setUp();
 
@@ -165,6 +169,7 @@ public abstract class ProviderTestCase2MockContext<T extends ContentProvider> ex
      * {@link android.content.ContentProvider} represented by mProvider.
      */
     @Override
+    @After
     protected void tearDown() throws Exception {
         shutdownProvider();
         super.tearDown();