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/RegionZonePreferenceController.java

@@ -18,10 +18,10 @@ package com.android.settings.datetime.timezone;
 
 import android.content.Context;
 
-import com.android.settings.R;
-
 import androidx.preference.Preference;
 
+import com.android.settings.R;
+
 public class RegionZonePreferenceController extends BaseTimeZonePreferenceController {
     private static final String PREFERENCE_KEY = "region_zone";