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/UsageGraph.java

@@ -35,11 +35,11 @@ import android.util.SparseIntArray;
 import android.util.TypedValue;
 import android.view.View;
 
+import androidx.annotation.VisibleForTesting;
+
 import com.android.settings.fuelgauge.BatteryUtils;
 import com.android.settingslib.R;
 
-import androidx.annotation.VisibleForTesting;
-
 public class UsageGraph extends View {
 
     private static final int PATH_DELIM = -1;