Deprecate --updatable-bcp-packages-fd and --updatable-bcp-packages-file

These flags are no longer needed and therefore deprecated. They are
still kept for compatibility, but they do not take any effect now.

Bug: 200241946
Test: Presubmits

Change-Id: I17b937e382cd3fe6eb20f2a686a638492c93d58e
9 files changed