intent.collectExtraIntentKeys only required when there are extra Intent

Set a flag FLAG_HAS_INTENT when an intent is added to a bundle so
that we can check if an intent's extra bundle contains intent.
We only requires top level intent calls intent.collectExtraIntentKeys
if it contains extra intents.

Bug: 380716871
Test: Manual
Flag: android.security.prevent_intent_redirect
Change-Id: I460f63fcf2bd04d3b22c4f2deba956d4af232f56