Remove the new task for mobile network page starts the sim onboarding

Bug: 349695880
Test: manually test
Flag: EXEMPT bugfix
Change-Id: Id5f35a9311da5e47f0417a45feadb1d1a0a2e35d

src/com/android/settings/network/SimOnboardingActivity.kt

@@ -588,11 +588,14 @@ class SimOnboardingActivity : SpaBaseDialogActivity() {
         fun startSimOnboardingActivity(
             context: Context,
             subId: Int,
+            isNewTask: Boolean = false,
         ) {
             val intent = Intent(context, SimOnboardingActivity::class.java).apply {
                 putExtra(SUB_ID, subId)
+                if(isNewTask) {
+                    setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+                }
             }
-            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
             context.startActivity(intent)
         }