Sort imports

Having consistent import order will reduce chance of merge
conflict between internal and external master

Test: rebuild
Change-Id: I0b1a170967ddcce7f388603fd521f6ed1eeba30b

src/com/android/settings/datetime/timezone/RegionZonePicker.java

@@ -23,6 +23,9 @@ import android.icu.util.TimeZone;
 import android.os.Bundle;
 import android.util.Log;
 
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+
 import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.R;
 import com.android.settings.datetime.timezone.model.FilteredCountryTimeZones;
@@ -36,9 +39,6 @@ import java.util.Date;
 import java.util.List;
 import java.util.TreeSet;
 
-import androidx.annotation.Nullable;
-import androidx.annotation.VisibleForTesting;
-
 /**
  * Given a region, render a list of time zone {@class TimeZoneInfo} into a list view.
  */