Pass EXTRA_CALLING_PACKAGE for legacy change default dialer/SMS intents.

So that RequestRoleActivity can always know the calling package. This
is required to keep supporting pre-Q apps calling with
startActivity().

Also fixed application info retrieval to be aware of multi-user.

Bug: 137054465
Test: manual
Change-Id: I686a97b543a0218837ee08291ef6fd9579a551d1