Use explicit shadow extraction types (#59192)

Summary:
Pull Request resolved: #59192

Replace redundant casts around Robolectric shadow extraction with explicit generic type arguments. This preserves compatibility with older Kotlin type inference while compiling cleanly under Kotlin 2.3.

Changelog: [Internal]

Reviewed By: siaojiecai

Differential Revision: D125947056

fbshipit-source-id: 55124f63a9d2a7d3d86989e1e80025d1448de1a2

Author: AlexeySoshin

packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/shadows/ShadowArguments.kt

@@ -29,7 +29,7 @@ class ShadowArguments {
     @Implementation
     fun fromJavaArgs(args: Array<Any?>): WritableNativeArray =
         WritableNativeArray().apply {
-          (Shadow.extract(this) as ShadowNativeArray).backingArray = JavaOnlyArray.of(*args)
+          Shadow.extract<ShadowNativeArray>(this).backingArray = JavaOnlyArray.of(*args)
         }
   }
 }

packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/shadows/ShadowArrayBuffer.kt

@@ -34,7 +34,7 @@ open class ShadowArrayBuffer {
     /** Simulates the native peer revoking a borrow when the call frame that lent the bytes ends. */
     @JvmStatic
     fun invalidate(arrayBuffer: ArrayBuffer) {
-      (Shadow.extract(arrayBuffer) as ShadowArrayBuffer).bytesValid = false
+      Shadow.extract<ShadowArrayBuffer>(arrayBuffer).bytesValid = false
     }
   }
 }

packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/shadows/ShadowNativeArray.kt

@@ -19,6 +19,6 @@ open class ShadowNativeArray {
 
   companion object {
     fun getContents(array: NativeArray): List<Any?> =
-        (Shadow.extract(array) as ShadowNativeArray).backingArray.toArrayList()
+        Shadow.extract<ShadowNativeArray>(array).backingArray.toArrayList()
   }
 }

packages/react-native/ReactAndroid/src/test/java/com/facebook/testutils/shadows/ShadowNativeMap.kt

@@ -41,6 +41,6 @@ open class ShadowNativeMap {
 
   companion object {
     fun getContents(map: NativeMap): Map<String, Any?> =
-        (Shadow.extract(map) as ShadowNativeMap).backingMap.toHashMap()
+        Shadow.extract<ShadowNativeMap>(map).backingMap.toHashMap()
   }
 }