Fix a few checkstyle issues

Change-Id: Id9c2de22b951d89809cbc29a5697e9615f642628
diff --git a/fragment/java/android/support/v4/app/FragmentTabHost.java b/fragment/java/android/support/v4/app/FragmentTabHost.java
index 77ad935..d1931d0 100644
--- a/fragment/java/android/support/v4/app/FragmentTabHost.java
+++ b/fragment/java/android/support/v4/app/FragmentTabHost.java
@@ -16,8 +16,6 @@
 
 package android.support.v4.app;
 
-import java.util.ArrayList;
-
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.os.Bundle;
@@ -31,6 +29,8 @@
 import android.widget.TabHost;
 import android.widget.TabWidget;
 
+import java.util.ArrayList;
+
 /**
  * Special TabHost that allows the use of {@link Fragment} objects for
  * its tab content.  When placing this in a view hierarchy, after inflating
diff --git a/media-compat/java/android/support/v4/media/TransportMediator.java b/media-compat/java/android/support/v4/media/TransportMediator.java
index 8e8ac2b..177f6aa 100644
--- a/media-compat/java/android/support/v4/media/TransportMediator.java
+++ b/media-compat/java/android/support/v4/media/TransportMediator.java
@@ -20,7 +20,6 @@
 import android.content.Context;
 import android.media.AudioManager;
 import android.os.Build;
-import android.support.v4.view.KeyEventCompat;
 import android.view.KeyEvent;
 import android.view.View;
 
diff --git a/v4/java/android/support/v4/content/WakefulBroadcastReceiver.java b/v4/java/android/support/v4/content/WakefulBroadcastReceiver.java
index 8e73c7f..fcfc674 100644
--- a/v4/java/android/support/v4/content/WakefulBroadcastReceiver.java
+++ b/v4/java/android/support/v4/content/WakefulBroadcastReceiver.java
@@ -45,7 +45,8 @@
  * {@link WakefulBroadcastReceiver#startWakefulService startWakefulService()}
  * holds an extra identifying the wake lock.</p>
  *
- * {@sample frameworks/support/samples/Support4Demos/src/com/example/android/supportv4/content/SimpleWakefulReceiver.java complete}
+ * {@sample frameworks/support/samples/Support4Demos/src/com/example/android/supportv4/content/SimpleWakefulReceiver.java
+ *      complete}
  *
  * <p>The service (in this example, an {@link android.app.IntentService}) does
  * some work. When it is finished, it releases the wake lock by calling
@@ -54,7 +55,8 @@
  * is the same intent that the {@link WakefulBroadcastReceiver} originally
  * passed in.</p>
  *
- * {@sample frameworks/support/samples/Support4Demos/src/com/example/android/supportv4/content/SimpleWakefulService.java complete}
+ * {@sample frameworks/support/samples/Support4Demos/src/com/example/android/supportv4/content/SimpleWakefulService.java
+ *      complete}
  */
 public abstract class WakefulBroadcastReceiver extends BroadcastReceiver {
     private static final String EXTRA_WAKE_LOCK_ID = "android.support.content.wakelockid";