themes: fix alert dialog colors

In night mode the input text and buttons
had the color of the background.

app/src/main/kotlin/d/d/meshenger/QRScanActivity.kt

@@ -16,12 +16,12 @@ import com.journeyapps.barcodescanner.DefaultDecoderFactory
 import com.google.zxing.ResultPoint
 import com.google.zxing.BarcodeFormat
 import android.content.ComponentName
-import android.app.AlertDialog
 import android.app.Dialog
 import android.os.IBinder
 import android.view.View
 import android.widget.Button
 import androidx.activity.result.contract.ActivityResultContracts
+import androidx.appcompat.app.AlertDialog
 import org.json.JSONException
 
 class QRScanActivity : BaseActivity(), BarcodeCallback, ServiceConnection {

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

@@ -34,10 +34,6 @@
         <item name="android:textSize">@dimen/headline_text_size</item>
     </style>
 
-    <style name="AlertDialogTheme" parent="Theme.AppCompat.Light.Dialog.Alert">
-         <item name="android:textColor">@android:color/black</item>
-    </style>
-
     <style name="MySpinner" parent="Theme.AppCompat.Light.DarkActionBar">
         <item name="android:dividerHeight">2dp</item>
         <item name="android:divider">#7C7B7B</item>

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

@@ -4,9 +4,6 @@
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>
         <item name="android:dropDownListViewStyle">@style/MySpinner</item>
-
-        <item name="android:textColor">@color/black</item>
-        <item name="android:textColorPrimary">@color/black</item>
     </style>
 
     <style name="AppTheme.FireRed" parent="AppThemeBase">
@@ -85,4 +82,7 @@
         <item name="tabSelectedTextColor">@color/black</item>
     </style>
 
+    <style name="AlertDialogTheme" parent="Theme.AppCompat.DayNight.Dialog.Alert">
+        <!-- Nothing to do for now -->
+    </style>
 </resources>