Add a removed_package module type

Because you can add non-existent packages to PRODUCT_PACKAGES, it
was requested to have a removed_package module type that can throw
an error if it is accidentally included in PRODUCT_PACKAGES.

You can't do this with just a c binary with a `#error` line because
checkbuild will attempt to build it.

Test: Manually
Change-Id: I25257dc90c1d93427112ec5d283f4d67e23174ee
diff --git a/android/Android.bp b/android/Android.bp
index 4e2006d..bb16856 100644
--- a/android/Android.bp
+++ b/android/Android.bp
@@ -98,6 +98,7 @@
         "raw_files.go",
         "recovery_build_prop.go",
         "register.go",
+        "removed_package.go",
         "rule_builder.go",
         "sandbox.go",
         "sbom.go",