added splashscreen for < Android 12

pls check

smali/res/drawable-night/bg_splash.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
+    android:opacity="opaque">
+    <item android:drawable="@color/gray_850" />
+    <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@drawable/vtlogo" />
+    </item>
+</layer-list>

smali/res/drawable/bg_splash.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
+    android:opacity="opaque">
+    <item android:drawable="@color/iclauncher" />
     <item>
-        <nine-patch android:src="@drawable/bg_splash_screen" />
+        <bitmap
+            android:gravity="center"
+            android:src="@drawable/vtlogo" />
     </item>
 </layer-list>

smali/res/values-night/styles.xml

@@ -1,6 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
+    <style name="SplashTheme" parent="@style/VkDarkStyle">
+        <item name="android:windowBackground">@drawable/bg_splash</item>
+        <item name="android:navigationBarColor">@color/gray_850</item>
+    </style>
+
     <style name="Theme.AppCompat.DayNight" parent="@style/Theme.AppCompat" />
 
     <style name="Theme.AppCompat.DayNight.DarkActionBar" parent="@style/Theme.AppCompat" />

smali/res/values-v23/styles.xml

@@ -25,6 +25,7 @@
 
     <style name="SplashTheme" parent="@style/VkLightStyle">
         <item name="android:windowBackground">@drawable/bg_splash</item>
+        <item name="android:navigationBarColor">@color/gray_20</item>
         <item name="android:windowLightStatusBar">true</item>
         <item name="android:windowLightNavigationBar">true</item>
     </style>

smali/res/values/styles.xml

@@ -3251,6 +3251,7 @@
 
     <style name="SplashTheme" parent="@style/VkLightStyle">
         <item name="android:windowBackground">@drawable/bg_splash</item>
+        <item name="android:navigationBarColor">@color/gray_20</item>
     </style>
 
     <style name="StickerDetailsDarkTheme" parent="@style/VkDarkTheme">