Rebranding: logo and icon changes

app/src/main/AndroidManifest.xml

@@ -15,7 +15,7 @@
     <application
         android:name=".TuskyApplication"
         android:allowBackup="false"
-        android:icon="@mipmap/ic_launcher"
+        android:icon="@drawable/ic_chinwag_logo_simple"
         android:label="@string/app_name"
         android:supportsRtl="true"
         android:theme="@style/TuskyTheme"
@@ -155,7 +155,7 @@
 
         <service
             android:name=".service.TuskyTileService"
-            android:icon="@drawable/ic_tusky"
+            android:icon="@drawable/ic_chinwag_logo_simple"
             android:label="Compose Toot"
             android:permission="android.permission.BIND_QUICK_SETTINGS_TILE"
             tools:targetApi="24">

app/src/main/res/drawable/background_splash.xml

@@ -1,11 +1,11 @@
 <?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item>
-        <color android:color="@color/tusky_grey_20"/>
+        <color android:color="@color/white"/>
     </item>
     <item>
         <bitmap
-            android:src="@drawable/splash"
+            android:src="@drawable/chinwag_splash"
             android:gravity="center" />
     </item>
 </layer-list>

app/src/main/res/values/theme_colors.xml

@@ -4,7 +4,7 @@
     <color name="colorSurface">@color/chinwag_grey_medium</color>
     <color name="colorPrimaryDark">@color/chinwag_green_light</color>
 
-    <color name="colorBackground">@color/tusky_grey_95</color>
+    <color name="colorBackground">@color/white</color>
     <color name="windowBackground">@color/tusky_grey_80</color>
 
     <color name="textColorPrimary">@color/tusky_grey_10</color>