Run soong_ui.bash using the same environment variables

We run soong_ui.bash multiple times per inner tree per api domain.
Running it using the same env vars ensures that we do not incur the cost
of retriggering api_bp2build and soong_build every single time

Test: multitree_build vendor/nothing locally (using
inner_build_cf_vendor.py)

Change-Id: Ibeff30b76db30cf322360a45089171543c1cf08c
1 file changed