Do not unparcel LazyValue in collectExtraIntentKeys method

collectExtraIntentKeys should only care about intents created in
this process, which would not be parceled when put in the extra
bundle. Unpparcel a LazyValue may cause issues when an app later
sets class loader to something else and prefer to unparcel it with
this new class loader.

Bug: 382633789
Test: manual test
Flag: EXEMPT bug fix
Change-Id: I4e14b255e8356a94816c38e8d0e9fa69ac38e6fb