feat(android): start animatable layers when splash drawable is layered (#2733)

Author: tntwist

android/capacitor/src/main/java/com/getcapacitor/Splash.java

@@ -9,6 +9,7 @@
 import android.graphics.PixelFormat;
 import android.graphics.drawable.Animatable;
 import android.graphics.drawable.Drawable;
+import android.graphics.drawable.LayerDrawable;
 import android.os.Handler;
 import android.view.Gravity;
 import android.view.View;
@@ -60,6 +61,18 @@ private static void buildViews(Context c, CapConfig config) {
         ((Animatable) splash).start();
       }
 
+      if(splash instanceof LayerDrawable){
+        LayerDrawable layeredSplash = (LayerDrawable) splash;
+
+        for(int i = 0; i < layeredSplash.getNumberOfLayers(); i++){
+          Drawable layerDrawable = layeredSplash.getDrawable(i);
+
+          if(layerDrawable instanceof  Animatable) {
+            ((Animatable) layerDrawable).start();
+          }
+        }
+      }
+
       splashImage = new ImageView(c);
 
       splashImage.setFitsSystemWindows(true);