Convert rust module-info.json to soong

This leads to idendical results as before, with the exception of
the "required" field in module-info.json. Make has more complicated
logic to fill out the required field than soong, and it leads to
make-specific names such as ones suffixed with :32 and don't make sense
in soong. I'm don't think there are critical users of that field though,
so I'll try removing it.

Everything else should be identical to the make-generated information
though.

Bug: 389720048
Test: diff'd module-info.json before and after this cl in soong+make mode
Change-Id: I74aefe578287f07474c15e5f92a0c2780a679047
diff --git a/rust/binary.go b/rust/binary.go
index d22041b..3c7a482 100644
--- a/rust/binary.go
+++ b/rust/binary.go
@@ -183,3 +183,8 @@
 func (binary *binaryDecorator) testBinary() bool {
 	return false
 }
+
+func (binary *binaryDecorator) moduleInfoJSON(ctx ModuleContext, moduleInfoJSON *android.ModuleInfoJSON) {
+	binary.baseCompiler.moduleInfoJSON(ctx, moduleInfoJSON)
+	moduleInfoJSON.Class = []string{"EXECUTABLES"}
+}