Instantiate HashMap for "ignoreBatteryOptimizations" correctly

permission_handler/android/src/main/java/com/baseflow/permissionhandler/PermissionManager.java

@@ -241,7 +241,9 @@ final class PermissionManager {
                     ? PermissionConstants.PERMISSION_STATUS_GRANTED
                     ? PermissionConstants.PERMISSION_STATUS_GRANTED
                     : PermissionConstants.PERMISSION_STATUS_DENIED;
                     : PermissionConstants.PERMISSION_STATUS_DENIED;
 
 
-            callback.onResult(new HashMap<>(PermissionConstants.PERMISSION_GROUP_IGNORE_BATTERY_OPTIMIZATIONS, status));
+            HashMap<Integer, Integer> results = new HashMap<>();
+            results.put(PermissionConstants.PERMISSION_GROUP_IGNORE_BATTERY_OPTIMIZATIONS, status);
+            callback.onResult(results);
             return true;
             return true;
         }
         }
     }
     }

permission_handler/example/android/app/src/main/AndroidManifest.xml

@@ -57,6 +57,9 @@
     <!-- Permissions options for the `activityRecognition` group -->
     <!-- Permissions options for the `activityRecognition` group -->
     <uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />
     <uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />
 
 
+    <!-- Permissions options for the `ignoreBatteryOptimizations` group -->
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+
     <application
     <application
         android:name="io.flutter.app.FlutterApplication"
         android:name="io.flutter.app.FlutterApplication"
         android:icon="@mipmap/ic_launcher"
         android:icon="@mipmap/ic_launcher"