global: optimize imports

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

ui/src/main/java/com/wireguard/android/util/AsyncWorker.java

@@ -5,10 +5,10 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
 import android.os.Handler;
 
+import com.wireguard.util.NonNullForAll;
+
 import java.util.concurrent.Executor;
 
 import java9.util.concurrent.CompletableFuture;

ui/src/main/java/com/wireguard/android/util/ClipboardUtils.java

@@ -5,15 +5,15 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
 import android.content.ClipData;
 import android.content.ClipboardManager;
 import android.content.Context;
-import com.google.android.material.snackbar.Snackbar;
 import android.view.View;
 import android.widget.TextView;
 
+import com.google.android.material.snackbar.Snackbar;
+import com.wireguard.util.NonNullForAll;
+
 /**
  * Standalone utilities for interacting with the system clipboard.
  */

ui/src/main/java/com/wireguard/android/util/DownloadsFileSaver.java

@@ -5,8 +5,6 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
 import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
@@ -18,6 +16,7 @@ import android.provider.MediaStore;
 import android.provider.MediaStore.MediaColumns;
 
 import com.wireguard.android.R;
+import com.wireguard.util.NonNullForAll;
 
 import java.io.File;
 import java.io.FileOutputStream;

ui/src/main/java/com/wireguard/android/util/ErrorMessages.java

@@ -5,13 +5,9 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
 import android.content.res.Resources;
 import android.os.RemoteException;
 
-import androidx.annotation.Nullable;
-
 import com.wireguard.android.Application;
 import com.wireguard.android.R;
 import com.wireguard.android.backend.BackendException;
@@ -24,11 +20,13 @@ import com.wireguard.config.ParseException;
 import com.wireguard.crypto.Key.Format;
 import com.wireguard.crypto.KeyFormatException;
 import com.wireguard.crypto.KeyFormatException.Type;
+import com.wireguard.util.NonNullForAll;
 
 import java.net.InetAddress;
 import java.util.EnumMap;
 import java.util.Map;
 
+import androidx.annotation.Nullable;
 import java9.util.Maps;
 
 @NonNullForAll

ui/src/main/java/com/wireguard/android/util/ExceptionLoggers.java

@@ -5,11 +5,9 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
-import androidx.annotation.Nullable;
 import android.util.Log;
 
+import androidx.annotation.Nullable;
 import java9.util.function.BiConsumer;
 
 /**

ui/src/main/java/com/wireguard/android/util/FragmentUtils.java

@@ -4,13 +4,13 @@
  */
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
 import android.content.Context;
-import androidx.preference.Preference;
 import android.view.ContextThemeWrapper;
 
 import com.wireguard.android.activity.SettingsActivity;
+import com.wireguard.util.NonNullForAll;
+
+import androidx.preference.Preference;
 
 @NonNullForAll
 public final class FragmentUtils {

ui/src/main/java/com/wireguard/android/util/ObservableKeyedArrayList.java

@@ -5,17 +5,16 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
-import androidx.databinding.ObservableArrayList;
-import androidx.annotation.Nullable;
-
 import com.wireguard.util.Keyed;
+import com.wireguard.util.NonNullForAll;
 
 import java.util.Collection;
 import java.util.ListIterator;
 import java.util.Objects;
 
+import androidx.annotation.Nullable;
+import androidx.databinding.ObservableArrayList;
+
 /**
  * ArrayList that allows looking up elements by some key property. As the key property must always
  * be retrievable, this list cannot hold {@code null} elements. Because this class places no

ui/src/main/java/com/wireguard/android/util/ObservableKeyedList.java

@@ -5,13 +5,12 @@
 
 package com.wireguard.android.util;
 
+import com.wireguard.util.Keyed;
+import com.wireguard.util.KeyedList;
 import com.wireguard.util.NonNullForAll;
 
 import androidx.databinding.ObservableList;
 
-import com.wireguard.util.Keyed;
-import com.wireguard.util.KeyedList;
-
 /**
  * A list that is both keyed and observable.
  */

ui/src/main/java/com/wireguard/android/util/ObservableSortedKeyedArrayList.java

@@ -5,11 +5,8 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
-import androidx.annotation.Nullable;
-
 import com.wireguard.util.Keyed;
+import com.wireguard.util.NonNullForAll;
 import com.wireguard.util.SortedKeyedList;
 
 import java.util.AbstractList;
@@ -21,6 +18,8 @@ import java.util.NoSuchElementException;
 import java.util.Set;
 import java.util.Spliterator;
 
+import androidx.annotation.Nullable;
+
 /**
  * KeyedArrayList that enforces uniqueness and sorted order across the set of keys. This class uses
  * binary search to improve lookup and replacement times to O(log(n)). However, due to the

ui/src/main/java/com/wireguard/android/util/ObservableSortedKeyedList.java

@@ -5,9 +5,8 @@
 
 package com.wireguard.android.util;
 
-import com.wireguard.util.NonNullForAll;
-
 import com.wireguard.util.Keyed;
+import com.wireguard.util.NonNullForAll;
 import com.wireguard.util.SortedKeyedList;
 
 /**