fix: Fix build for RN 0.81 (#3583)

* Update CameraViewModule.kt

* Update CameraViewManager.kt

Author: riteshshukla04

package/android/src/main/java/com/mrousavy/camera/react/CameraViewManager.kt

@@ -27,7 +27,7 @@ class CameraViewManager : ViewGroupManager<CameraView>() {
     view.update()
   }
 
-  override fun getExportedCustomDirectEventTypeConstants(): MutableMap<String, Any>? =
+  override fun getExportedCustomDirectEventTypeConstants(): Map<String, Any>? =
     MapBuilder.builder<String, Any>()
       .put(CameraViewReadyEvent.EVENT_NAME, MapBuilder.of("registrationName", "onViewReady"))
       .put(CameraInitializedEvent.EVENT_NAME, MapBuilder.of("registrationName", "onInitialized"))

package/android/src/main/java/com/mrousavy/camera/react/CameraViewModule.kt

@@ -189,7 +189,7 @@ class CameraViewModule(reactContext: ReactApplicationContext) : ReactContextBase
   }
 
   private fun canRequestPermission(permission: String): Boolean {
-    val activity = currentActivity as? PermissionAwareActivity
+    val activity = reactApplicationContext.currentActivity as? PermissionAwareActivity
     return activity?.shouldShowRequestPermissionRationale(permission) ?: false
   }