Don't send PACKAGE_CHANGED of components to manifest receivers.

To reduce broadcast spam, when we send a PACKAGE_CHANGE filter that
to only go to registered receivers if it is reporting a change in
components of a package (not a change in the overall package).  There
should be no reason for apps to launch if component states change
(they can always query the next time they run), and since apps can
change their component state as needed and don't think of this as
an especially expensive operation, we don't want that to result in
a lot of other apps launching.

Change-Id: I5fd005c4ff838b6eade767cf87a928e906f4de63