removed barcode scanner (used google GMS library)

removed firebase code and all log events.
replaced barcode scanner with ZXing intent
replaced crashyltics with ACRA and email

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

@@ -1,12 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-
-    <style name="Theme.ZooForZotero" parent="Theme.MaterialComponents.Light.DarkActionBar">
+    <style name="Theme.ZooForZotero" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
         <item name="colorPrimary">@color/colorPrimary</item>
-        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
-        <item name="colorAccent">@color/colorAccent</item>
+        <item name="colorPrimaryDark">#000000</item>
+        <item name="colorAccent">@color/colorPrimary</item>
     </style>
 
+
     <style name="Theme.ZooForZotero.NoActionBar" parent="Theme.ZooForZotero">
         <item name="windowActionBar">false</item>
         <item name="windowNoTitle">true</item>