Fix issue in theme

vector/src/main/res/drawable/bg_search_edit_text_black.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@color/riotx_search_background_mobile_black" />
+    <corners android:radius="4dp" />
+</shape>

vector/src/main/res/drawable/bg_search_edit_text_dark.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android">
-    <solid android:color="@color/light_blue_grey" />
+    <solid android:color="@color/riotx_search_background_mobile_dark" />
     <corners android:radius="4dp" />
 </shape>

vector/src/main/res/drawable/bg_search_edit_text_light.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+    <solid android:color="@color/riotx_search_background_mobile_light" />
+    <corners android:radius="4dp" />
+</shape>

vector/src/main/res/drawable/bg_splash.xml

@@ -1,17 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<layer-list xmlns:android="http://schemas.android.com/apk/res/android"
-    android:opacity="opaque">
-    <item>
-        <shape>
-            <solid android:color="@android:color/white" />
-        </shape>
-    </item>
-
-    <item android:gravity="top">
-        <shape android:shape="rectangle">
-            <size android:height="80dp" />
-            <!--<solid android:color="?colorPrimary" />-->
-            <solid android:color="@color/dark" />
-        </shape>
-    </item>
-</layer-list>

vector/src/main/res/drawable/bg_unread_highlight.xml

@@ -4,5 +4,5 @@
 
     <corners android:radius="40dp" />
 
-    <solid android:color="@color/rosy_pink" />
+    <solid android:color="@color/riotx_notice" />
 </shape>