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/BaseTimeZoneInfoPicker.java

@@ -24,6 +24,8 @@ import android.icu.text.DateFormat;
 import android.icu.text.SimpleDateFormat;
 import android.icu.util.Calendar;
 
+import androidx.annotation.Nullable;
+
 import com.android.settings.R;
 import com.android.settings.datetime.timezone.model.TimeZoneData;
 
@@ -32,8 +34,6 @@ import java.util.Date;
 import java.util.List;
 import java.util.Locale;
 
-import androidx.annotation.Nullable;
-
 /**
  * Render a list of {@class TimeZoneInfo} into the list view in {@class BaseTimeZonePicker}
  */