kmod: Add target build for libkmod

This library will be used for a vendor test suites.

Bug: 268289254
Test: build success
Change-Id: I509b39eff7c11e311dd36a9b871a24ab8d80193e
diff --git a/Android.bp b/Android.bp
index 4aed46a..e74d3cc 100644
--- a/Android.bp
+++ b/Android.bp
@@ -88,6 +88,7 @@
     visibility: [
         "//external/igt-gpu-tools",
         "//external/pciutils",
+        "//vendor:__subpackages__",
     ],
 }