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: I305d9a549fc132c3d14f56eae1abbac1b9defd10
diff --git a/boot/Android.bp b/boot/Android.bp
index f60bb9e..6eead42 100644
--- a/boot/Android.bp
+++ b/boot/Android.bp
@@ -234,7 +234,7 @@
     ],
 }
 
-genrule { // This module exists to make the srcjar output available to Make.
+java_genrule { // This module exists to make the srcjar output available to Make.
     name: "platform-bootclasspath.srcjar",
     srcs: [":platform-bootclasspath{.srcjar}"],
     out: ["platform-bootclasspath.srcjar"],