ui: don't play with status and navigation colors on old APIs

Signed-off-by: Jason A. Donenfeld <[email protected]>

Author: zx2c4

ui/src/main/res/values-v23/styles.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <style name="AppTheme" parent="AppThemeBase">
+        <item name="android:statusBarColor">?android:colorBackground</item>
+        <item name="android:windowLightStatusBar">@bool/light_status_bar</item>
+    </style>
+</resources>

ui/src/main/res/values-v27/styles.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <style name="AppTheme" parent="AppThemeBase">
+        <item name="android:statusBarColor">?android:colorBackground</item>
+        <item name="android:windowLightStatusBar">@bool/light_status_bar</item>
+        <item name="android:navigationBarColor">?android:colorBackground</item>
+        <item name="android:windowLightNavigationBar">@bool/light_navigation_bar</item>
+    </style>
+</resources>

ui/src/main/res/values/styles.xml

@@ -5,16 +5,15 @@
         <item name="android:background">?attr/colorSurface</item>
     </style>
 
-    <style name="AppTheme" parent="WireGuardTheme">
-        <item name="android:statusBarColor">?android:colorBackground</item>
-        <item name="android:navigationBarColor">?android:colorBackground</item>
-        <item name="android:windowLightNavigationBar">@bool/light_navigation_bar</item>
-        <item name="android:windowLightStatusBar">@bool/light_status_bar</item>
+    <style name="AppThemeBase" parent="WireGuardTheme">
         <item name="materialCardViewStyle">@style/WireGuardTheme.MaterialCardView</item>
         <item name="toolbarStyle">@style/WireGuardTheme.Toolbar</item>
         <item name="bottomSheetDialogTheme">@style/WireGuardTheme.BottomSheetDialog</item>
     </style>
 
+    <!-- Various additional API-specific features in values-v*/styles.xml -->
+    <style name="AppTheme" parent="AppThemeBase"/>
+
     <style name="WireGuardTheme.MaterialCardView" parent="Widget.Material3.CardView.Elevated">
         <item name="cornerRadius">4dp</item>
         <item name="contentPadding">8dp</item>