Make AdsjsJsMessageCallback an interface

Author: CrisBarreiro

app/src/main/java/com/duckduckgo/app/browser/BrowserTabFragment.kt

@@ -3044,7 +3044,7 @@ class BrowserTabFragment :
                 webViewClient.triggerJSInit(it)
                 adsJsContentScopeScripts.register(
                     it,
-                    object : AdsjsJsMessageCallback() {
+                    object : AdsjsJsMessageCallback {
                         override fun process(
                             featureName: String,
                             method: String,

content-scope-scripts/content-scope-scripts-impl/src/test/java/com/duckduckgo/contentscopescripts/impl/messaging/AdsjsContentScopeScriptsJsMessagingTest.kt

@@ -221,7 +221,7 @@ class AdsjsContentScopeScriptsJsMessagingTest {
         verify(mockWebView).safeRemoveWebMessageListener(any())
     }
 
-    private val callback = object : AdsjsJsMessageCallback() {
+    private val callback = object : AdsjsJsMessageCallback {
         var counter = 0
         override fun process(
             featureName: String,

js-messaging/js-messaging-api/src/main/java/com/duckduckgo/js/messaging/api/AdsjsMessaging.kt

@@ -41,8 +41,8 @@ interface AdsjsMessaging {
     val allowedDomains: Set<String>
 }
 
-abstract class AdsjsJsMessageCallback {
-    abstract fun process(
+interface AdsjsJsMessageCallback {
+    fun process(
         featureName: String,
         method: String,
         id: String?,