Make sure dist files have license metadata.

Bug: 151177513
Bug: 210912771

Test: m droid dist reportmissinglicenses

Change-Id: I0c85f6c49a3e9d9bb3219ed6ddfb939d90f80656

apex/androidmk.go

@@ -412,6 +412,7 @@ func (a *apexBundle) androidMkForType() android.AndroidMkData {
 					fmt.Fprintln(w, ".PHONY:", goal)
 					fmt.Fprintf(w, "$(call dist-for-goals,%s,%s:%s)\n",
 						goal, a.installedFilesFile.String(), distFile)
+					fmt.Fprintf(w, "$(call declare-0p-target,%s)\n", a.installedFilesFile.String())
 				}
 				for _, dist := range data.Entries.GetDistForGoals(a) {
 					fmt.Fprintf(w, dist)