Package jacoco and proguard files out of a PACKAGING directory

Package jacoco-report-classes.jar, proguard_usage.zip and
proguard_dictionary out of directories in $OUT/obj/PACKAGING
so that they get cleared by m installclean.  This will make
incremental builds that package these files accurate as long
as installclean was run, which is much faster than a full clean
build.

Bug: 184583915
Test: m TARGET_BUILD_APPS=DeskClock EMMA_INSTRUMENT=true dist
Change-Id: I60c6a0fec1fbce26eab8d5adab25a2231b48e251