Improve dynamic colors receiver

Author: pranavpandey

dynamic-support/src/main/java/com/pranavpandey/android/dynamic/support/theme/receiver/DynamicColorsReceiver.java

@@ -35,7 +35,11 @@ public class DynamicColorsReceiver extends BroadcastReceiver {
 
     @Override
     public void onReceive(@NonNull Context context, @Nullable Intent intent) {
-        if (intent != null && Intent.ACTION_WALLPAPER_CHANGED.equals(intent.getAction())) {
+        if (intent == null || intent.getAction() == null) {
+            return;
+        }
+
+        if (Intent.ACTION_WALLPAPER_CHANGED.equals(intent.getAction())) {
             try {
                 DynamicTheme.getInstance().onAutoThemeChanged(false);
             } catch (Exception ignored) {