Guard null nav context in Android Auto and queue source

Author: APIUM

lib/models/finamp_models.dart

@@ -1992,7 +1992,9 @@ class QueueItemSource {
               type: QueueItemSourceNameType.preTranslated,
               pretranslatedName:
                   baseItem.name ??
-                  AppLocalizations.of(GlobalSnackbar.materialAppScaffoldKey.currentContext!)!.placeholderSource,
+                  (GlobalSnackbar.materialAppScaffoldKey.currentContext != null
+                      ? AppLocalizations.of(GlobalSnackbar.materialAppScaffoldKey.currentContext!)!.placeholderSource
+                      : "Playing"),
             ),
       id: baseItem.id,
       item: baseItem,

lib/services/android_auto_helper.dart

@@ -532,9 +532,10 @@ class AndroidAutoHelper {
       mediaItems.add(
         MediaItem(
           id: QueueItemSourceNameType.shuffleAll.name,
-          title:
-              AppLocalizations.of(GlobalSnackbar.materialAppScaffoldKey.currentContext!)?.shuffleAll ??
-              "Shuffle All Tracks",
+          title: GlobalSnackbar.materialAppScaffoldKey.currentContext != null
+              ? (AppLocalizations.of(GlobalSnackbar.materialAppScaffoldKey.currentContext!)?.shuffleAll ??
+                    "Shuffle All Tracks")
+              : "Shuffle All Tracks",
           playable: true,
         ),
       );