[Catalyst] Update PreferenceLifecycleContext.notifyPreferenceChange

Change the signature from metadata to preference key, so that the API
could be used to notify other preferences on the same screen.

Bug: 332201912
Flag: com.android.settings.flags.catalyst
Test: atest
Change-Id: I1cfa35077551cb614b9892c7433f6e733bc55d0e