Fix failed tests since presubmit is ignored in ag/15802168 am: 27efa546cf am: a168e2e0fc

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/15809054

Change-Id: I8396a058b78d2c37ebf223e26884860061a08b84

src/com/android/settings/fuelgauge/BatteryDiffEntry.java

@@ -113,7 +113,9 @@ public class BatteryDiffEntry {
     /** Gets the app icon {@link Drawable} for this entry. */
     public Drawable getAppIcon() {
         loadLabelAndIcon();
-        return mAppIcon.getConstantState().newDrawable();
+        return mAppIcon != null && mAppIcon.getConstantState() != null
+                ? mAppIcon.getConstantState().newDrawable()
+                : null;
     }
 
     /** Gets the app icon id for this entry. */