Track allowed transitive deps in any updatable module.

Instead of tracking per module and per module variant, track allowed
list of dependecies for all modules combined. This avoids issues with
different products and different downstream branches having different
build graphs.

To compare allowed_deps.txt vs head, run:
:; m -j out/soong/apex/depsinfo/new-allowed-deps.txt.check

To update source allowed_deps.txt, run:
:; build/soong/scripts/update-apex-allowed-deps.sh

Bug: 149622332
Test: m
Change-Id: I56771ba3fea748de8e9c58c80758670572f7af53
Merged-In: Ic518fbd9ebfe1b46aaf9a58df731780a7e5a676b