Add dark theme variants of the fullscreen style

app/src/main/java/com/beemdevelopment/aegis/ThemeMap.java

@@ -20,4 +20,10 @@ public class ThemeMap {
             Theme.DARK, R.style.AppTheme_Dark_NoActionBar,
             Theme.AMOLED, R.style.AppTheme_TrueBlack_NoActionBar
     );
+
+    public static final Map<Theme, Integer> FULLSCREEN = ImmutableMap.of(
+            Theme.LIGHT, R.style.AppTheme_Fullscreen,
+            Theme.DARK, R.style.AppTheme_Fullscreen_Dark,
+            Theme.AMOLED, R.style.AppTheme_Fullscreen_TrueBlack
+    );
 }

app/src/main/java/com/beemdevelopment/aegis/ui/ScannerActivity.java

@@ -17,6 +17,7 @@ import androidx.camera.view.PreviewView;
 import androidx.core.content.ContextCompat;
 
 import com.beemdevelopment.aegis.R;
+import com.beemdevelopment.aegis.ThemeMap;
 import com.beemdevelopment.aegis.helpers.QrCodeAnalyzer;
 import com.beemdevelopment.aegis.otp.GoogleAuthInfo;
 import com.beemdevelopment.aegis.otp.GoogleAuthInfoException;
@@ -77,7 +78,7 @@ public class ScannerActivity extends AegisActivity implements QrCodeAnalyzer.Lis
 
     @Override
     protected void onSetTheme() {
-        setTheme(R.style.AppTheme_Fullscreen);
+        setTheme(ThemeMap.FULLSCREEN);
     }
 
     @Override

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

@@ -126,6 +126,30 @@
         <item name="android:windowFullscreen">true</item>
     </style>
 
+    <style name="AppTheme.Fullscreen.Dark" parent="AppTheme.Dark">
+        <!-- AppTheme.TransparentActionBar-->
+        <item name="android:actionBarStyle">@style/ThemeActionBar</item>
+        <item name="android:windowActionBarOverlay">true</item>
+        <item name="actionBarStyle">@style/ThemeActionBar</item>
+        <item name="windowActionBarOverlay">true</item>
+
+        <!-- AppTheme.Fullscreen-->
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowFullscreen">true</item>
+    </style>
+
+    <style name="AppTheme.Fullscreen.TrueBlack" parent="AppTheme.TrueBlack">
+        <!-- AppTheme.TransparentActionBar-->
+        <item name="android:actionBarStyle">@style/ThemeActionBar</item>
+        <item name="android:windowActionBarOverlay">true</item>
+        <item name="actionBarStyle">@style/ThemeActionBar</item>
+        <item name="windowActionBarOverlay">true</item>
+
+        <!-- AppTheme.Fullscreen-->
+        <item name="android:windowNoTitle">true</item>
+        <item name="android:windowFullscreen">true</item>
+    </style>
+
     <style name="AppTheme.Dark" parent="Theme.AppCompat">
         <item name="primaryText">@color/primary_text_dark</item>
         <item name="secondaryText">@color/secondary_text_dark</item>