fix: Fix a case where no camera devices are loaded on app start (mrousavy#3575)

Author: hannojg

android/src/main/java/com/mrousavy/camera/react/CameraDevicesManager.kt

@@ -59,9 +59,8 @@ class CameraDevicesManager(private val reactContext: ReactApplicationContext) :
 
   override fun getName(): String = TAG
 
-  override fun initialize() {
-    super.initialize()
-    cameraManager.registerAvailabilityCallback(callback, null)
+  // Init cameraProvider + manager as early as possible
+  init {
     coroutineScope.launch {
       try {
         Log.i(TAG, "Initializing ProcessCameraProvider...")
@@ -76,6 +75,12 @@ class CameraDevicesManager(private val reactContext: ReactApplicationContext) :
     }
   }
 
+  // Note: initialize() will be called after getConstants on new arch!
+  override fun initialize() {
+    super.initialize()
+    cameraManager.registerAvailabilityCallback(callback, null)
+  }
+
   override fun invalidate() {
     cameraManager.unregisterAvailabilityCallback(callback)
     super.invalidate()