Install apex symlinks in m --soong-only

Apexes such as com.android.runtime install additional symlinks in the
staging $PRODUCT_OUT/apex directory. It uses
PathForModuleInPartition("apex") to avoid the side affect of
inadvertently copying this into rdeps such as system.img

To prevent non-null builds when switching between `m` and `m
--soong-only`, remove this special case.

Test: m nothing
Bug: 390471378
Change-Id: I81ff7b9c18f84cbe83836e6992124080c93359d2
diff --git a/apex/builder.go b/apex/builder.go
index daba6f1..b317472 100644
--- a/apex/builder.go
+++ b/apex/builder.go
@@ -552,7 +552,7 @@
 
 	imageDir := android.PathForModuleOut(ctx, "image"+suffix)
 
-	installSymbolFiles := (ctx.Config().KatiEnabled() && a.ExportedToMake()) && a.installable()
+	installSymbolFiles := a.ExportedToMake() && a.installable()
 
 	// set of dependency module:location mappings
 	installMapSet := make(map[string]bool)