Apply AttributionSource during Intent delivery.

There are some Parcelables which offer to perform Binder calls, and
when these are delivered via Intent extras they fallback to
ActivityThread.currentAttributionSource(), instead of being tagged
based on the relevant app component.

This change begins using Intent.prepareToEnterProcess() as a hook to
fix-up AttributionSource when those extras finally land in the
destination process.  It uses the relevant AttributionSource based
on the Activity or Service the Intent is delivered to, which
developers have control over via AppComponentFactory.

In the case of <receiver> manifest elements, this change applies the
first android:attributionTags value to the Context used for that
BroadcastReceiver.

Bug: 187097694
Test: atest AttributionTest
Change-Id: I8f5197db7e8d7277d34f0ef2bb90bfdf1871186a