update splash assets

Author: Pavel401

android/app/src/main/res/drawable-hdpi/splash.png

@@ -1,3 +1,3 @@
 flutter_native_splash:
   image: assets/images/taskwarrior_dark.png
-  color: "#1a1a1a"
+  color: "#1a1a1a"

android/app/src/main/res/drawable-v21/background.png

@@ -37,7 +37,7 @@
       <source srcset="splash/img/light-1x.png 1x, splash/img/light-2x.png 2x, splash/img/light-3x.png 3x, splash/img/light-4x.png 4x" media="(prefers-color-scheme: light)">
       <source srcset="splash/img/dark-1x.png 1x, splash/img/dark-2x.png 2x, splash/img/dark-3x.png 3x, splash/img/dark-4x.png 4x" media="(prefers-color-scheme: dark)">
       <img class="center" aria-hidden="true" src="splash/img/light-1x.png" alt="">
-  </picture>
+  </picture>    
 
 
   <!-- This script installs service_worker.js to provide PWA functionality to

android/app/src/main/res/drawable-xxhdpi/splash.png

@@ -1,8 +1,11 @@
+html {
+  height: 100%
+}
+
 body {
-  margin:0;
-  height:100%;
-  background: #1a1a1a;
-  
+  margin: 0;
+  min-height: 100%;
+  background-color: #1a1a1a;
   background-size: 100% 100%;
 }
 
@@ -51,13 +54,3 @@ body {
   bottom: 0;
   right: 0;
 }
-
-@media (prefers-color-scheme: dark) {
-  body {
-    margin:0;
-    height:100%;
-    background: #1a1a1a;
-    
-    background-size: 100% 100%;
-  }
-}