Android builds fixed

- new icon
- fixed android icons
- fixed android status & navigation bar
- added "Splash" page

assets/icon-background.svg

@@ -0,0 +1,9 @@
+<svg width="512" height="512" viewBox="0 0 512 512" fill="none" xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <linearGradient id="bg_grad" x1="0%" y1="0%" x2="100%" y2="100%">
+      <stop offset="0%" stop-color="#b870ff" />
+      <stop offset="100%" stop-color="#a64aff" />
+    </linearGradient>
+  </defs>
+  <rect width="512" height="512" fill="url(#bg_grad)" />
+</svg>