Add intent wedge scanner, MDM support for Android (#863)

Add Android intent wedge scanner support with auto configuration for supported Zebra and Datalogic devices.
Intent wedge scans can be done without pressing the scan button first.

Adds the ability for an MDM server to push settings on Android.

lib/barcode/barcode.dart

@@ -18,6 +18,7 @@ import "package:inventree/api.dart";
 import "package:inventree/l10.dart";
 
 import "package:inventree/barcode/camera_controller.dart";
+import "package:inventree/barcode/intent_controller.dart";
 import "package:inventree/barcode/wedge_controller.dart";
 import "package:inventree/barcode/controller.dart";
 import "package:inventree/barcode/handler.dart";
@@ -68,6 +69,53 @@ Future<void> barcodeFailure(String msg, dynamic extra) async {
   );
 }
 
+void initGlobalIntentListener() {
+  bool _processing = false;
+
+  datawedgeStream.listen((event) async {
+    if (intentScannerActive) return;
+    if (_processing) return;
+
+    _processing = true;
+
+    try {
+      final int controllerType =
+          await InvenTreeSettingsManager().getValue(
+                INV_BARCODE_SCAN_TYPE,
+                BARCODE_CONTROLLER_CAMERA,
+              )
+              as int;
+      if (controllerType != BARCODE_CONTROLLER_INTENT) return;
+
+      if (!InvenTreeAPI().isConnected()) return;
+
+      String barcode = "";
+      if (event is Map) {
+        final map = Map<String, dynamic>.from(event);
+        barcode = (map["data"] ?? "").toString();
+      } else if (event is String) {
+        barcode = event;
+      }
+
+      if (barcode.isEmpty) return;
+
+      if (!OneContext.hasContext) return;
+
+      await OneContext().navigator.push(
+        PageRouteBuilder(
+          pageBuilder: (context, _, _) => IntentBarcodeController(
+            BarcodeScanHandler(),
+            initialBarcode: barcode,
+          ),
+          opaque: false,
+        ),
+      );
+    } finally {
+      _processing = false;
+    }
+  });
+}
+
 /*
  * Launch a barcode scanner with a particular context and handler.
  * 
@@ -93,6 +141,8 @@ Future<Object?> scanBarcode(
           as int;
 
   switch (barcodeControllerType) {
+    case BARCODE_CONTROLLER_INTENT:
+      controller = IntentBarcodeController(handler);
     case BARCODE_CONTROLLER_WEDGE:
       controller = WedgeBarcodeController(handler);
     case BARCODE_CONTROLLER_CAMERA: