Disabling GetCookies API from webapps APIs, Fixes AB#3624552 (#3135)

### Summary
We are disabling the GetCookies API as Edge will use getAllSsoTokens
instead. There shouldn't be any dependencies here as Edge nor anyone
else has actually been calling this API yet.


[AB#3624552](https://identitydivision.visualstudio.com/Engineering/_workitems/edit/3624552)

Author: melissaahn

changelog.txt

@@ -18,6 +18,7 @@ vNext
 - [PATCH] Move Multiple Listening apps check to the authorization layer (#3070)
 - [MINOR] Add NativeAuthRequestInterceptor for custom per-request headers in native auth flows (#3112)
 - [PATCH] Edge TB: Fix lookup mode (#3108)
+- [MINOR] Disabling GetCookies API from webapps APIs (#3135)
 
 Version 24.2.0
 ----------

common4j/src/main/com/microsoft/identity/common/java/commands/webapps/WebAppsSupportedContracts.kt

@@ -22,24 +22,24 @@
 // THE SOFTWARE.
 package com.microsoft.identity.common.java.commands.webapps
 
+import com.microsoft.identity.common.java.util.ObjectMapper
 import java.io.Serializable
 
 /**
  * Supported contracts for Web Apps Sub Operations
  */
 data class WebAppsSupportedContracts(
-    val contracts: List<String> = listOf(GET_TOKEN, SIGN_OUT, GET_COOKIES)
+    val contracts: List<String> = listOf(GET_TOKEN, SIGN_OUT)
 ) : Serializable {
     companion object {
         const val GET_TOKEN = "GetToken"
         const val SIGN_OUT = "SignOut"
+        // GET_COOKIES contract is currently not needed by Edge (and thus not included in the contracts list),
+        // but we are keeping the const here for future use if needed.
         const val GET_COOKIES = "GetCookies"
     }
 
     override fun toString(): String {
-        return contracts.joinToString(
-            separator = ", ",
-            prefix = "[",
-            postfix = "]")
+        return ObjectMapper.serializeObjectToJsonString(contracts)
     }
 }