Install updatable-bcp-packages.txt and boot-image.bprof

Previous refactorings of the code for creating these two files caused
them to be created before the boot.prof file instead of afterwards. As
a result even though they were appended to the list of files to install
they were discarded when the boot.prof file set the list rather than
appended to it. That worked before the refactoring because the
boot.prof file set the list first before the others were appended to
it.

This change appends the boot.prof file to the list making the order in
which they are added irrelevant.

Bug: 187494247
Test: m nothing
      - check DEXPREOPT_IMAGE_PROFILE_BUILT_INSTALLED in generated
        make_vars file to ensure it includes all 3 files.
Change-Id: Idb94531daf61b1b047c72eb5c67a57d3fdced05c