Remove dependencies on the 1-variant fallback

When adding a dependencies, if the variants don't match, but the
dependency only has 1 variant anyways, soong will always use that
variant. This makes it hard to add new variants to soong, because the
1-variant fallback stops being used and you start getting missing
variant errors. Make changes to bp files such that all dependencies
correctly specify the variant to use.

Bug: 372091092
Flag: EXEMPT refactor
Test: m nothing
Change-Id: I586e9329c22fa94c2fe83a56dc34dff1fe311900