Don't install modules in unexported namespaces

Make builds handle modules with duplicate names in different
namespaces by passing a list of exported namespaces to Soong.
Soong-only builds can try to install both modules, leading to
a duplicate rule error.  Re-use the same list of exported
namespaces in Soong, which will be empty in all existing
Soong-only builds.  This will effectively only install modules
in the root namespace in Soong-only builds.

Test: m checkbuild
Bug: 79369665
Change-Id: Ie80d4b77e1dce165a33579fcf58b571989794b35
diff --git a/android/module.go b/android/module.go
index 552d165..4797c0c 100644
--- a/android/module.go
+++ b/android/module.go
@@ -1015,6 +1015,13 @@
 		return true
 	}
 
+	// We'll need a solution for choosing which of modules with the same name in different
+	// namespaces to install.  For now, reuse the list of namespaces exported to Make as the
+	// list of namespaces to install in a Soong-only build.
+	if !a.module.base().commonProperties.NamespaceExportedToMake {
+		return true
+	}
+
 	if a.Device() {
 		if a.Config().SkipDeviceInstall() {
 			return true