Fix SelfComparison lint error in NativeModuleRegistry.kt (#55444)

Summary:
Pull Request resolved: #55444

Fixed SelfComparison lint error by extracting the compared values into separate local variables, making it clearer to the linter that we're comparing two different instances.

The original code was comparing `this.reactApplicationContext` with `newRegister.reactApplicationContext`, but the linter incorrectly flagged it as a self-comparison due to the same property name.

changelog: [internal] internal

Reviewed By: cortinico

Differential Revision: D91797839

fbshipit-source-id: 5f475490c7e167eff46108e3a9c48b9072853f50

Author: mdvacca

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/bridge/NativeModuleRegistry.kt

@@ -46,7 +46,9 @@ public class NativeModuleRegistry(
   ) // This is needed till there are Java Consumer of this API inside React
   // Native
   internal fun registerModules(newRegister: NativeModuleRegistry) {
-    check(reactApplicationContext == newRegister.reactApplicationContext) {
+    val ownContext = reactApplicationContext
+    val otherContext = newRegister.reactApplicationContext
+    check(ownContext == otherContext) {
       "Extending native modules with non-matching application contexts."
     }