Reduce how often both mutated variants are needed.

This CL rolls back how often we bubble up both sanitized and
un-sanitized variants of a component. With this change only
CFI-enabled target static libraries will do this, all other cases
suppress one of the two variants (both from being installed and from
being exposed to Make for make-embedded builds).

This means we shouldn't need a separate sanitizer suffix for ASAN at
all (.asan), and similarly for non static-lib CFI components (.cfi),
so this CL changes that as well.

Lastly, because the version of ar meant for the host is not built
with plugin support (which CFI requires), this CL disables CFI for
host targets.

This CL should fix the following 2 issues:
(1) Removing warnings about multiple rules existing for the same
installable target.

(2) Fixing VTS packaging, which had been broken by the generation of
the .asan suffix.

Bug: 69172424, 69059192, 67507323
Test: m -j40 # Soong generated .mk file does not have duplicate rules.
Test: SANITIZE_TARGET="address" m -j40 libstagefright # installed
correctly.

Change-Id: Ib90fdbc8a6ad3924fc2a691b7277a8a1bc67cda8