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/widget/AppPreference.java

@@ -21,11 +21,11 @@ import android.util.AttributeSet;
 import android.view.View;
 import android.widget.ProgressBar;
 
-import com.android.settings.R;
-
 import androidx.preference.Preference;
 import androidx.preference.PreferenceViewHolder;
 
+import com.android.settings.R;
+
 public class AppPreference extends Preference {
 
     private int mProgress;