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/datausage/DataSaverPreference.java

@@ -17,10 +17,10 @@ package com.android.settings.datausage;
 import android.content.Context;
 import android.util.AttributeSet;
 
-import com.android.settings.R;
-
 import androidx.preference.Preference;
 
+import com.android.settings.R;
+
 public class DataSaverPreference extends Preference implements DataSaverBackend.Listener {
 
     private final DataSaverBackend mDataSaverBackend;