This will be a container for the the apex_contributions
selected using build flags. This module will be used to query the state of
selected apex contributions instead of a global that can be mutated by
anyone.
It will set a provider containing metadata for source vs prebuilts
selection. To reduce the overhead of a new mutator, this will be done in
the existing `prebuilt_select` mutator.
It will validate that there are no dups (`foo` and `prebuilt_foo` cannot
be both selected)
Bug: 308174923
Test: go test ./android
Change-Id: Ie42999a71f35d70e0e977f5ab07ce451608d9f35
This module type does not any build actions, but provides metadata about
the contributions of the mainline module to other mainline modules/
platform. One immediate use case for this metadata is source vs
prebuilts selection
Each mainline module can have more than 1 metadata modules. Static build
flags will be used to select the right one in trunk.bzl, next.bzl, ...
Bug: 308174923
Test: go build ./android
Change-Id: I5ead0c38fe64b78de08db1736d97a8ab7374d6d9