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/notification/ZenCustomRadioButtonPreference.java

@@ -21,11 +21,11 @@ import android.util.AttributeSet;
 import android.view.View;
 import android.widget.RadioButton;
 
+import androidx.preference.PreferenceViewHolder;
+
 import com.android.settings.R;
 import com.android.settingslib.TwoTargetPreference;
 
-import androidx.preference.PreferenceViewHolder;
-
 /**
  * A radio button preference with a divider and a settings icon that links to another screen.
  */