Export soong license data to make.

See: http://go/android-license-checking-in-soong-v2-design

Bug: 151953481
Bug: 151177513
Bug: 67772237

Change-Id: If9d661dfcaa732c459d38d8ad7ec4a0e540846b8

java/system_modules.go

@@ -192,6 +192,7 @@ func (system *SystemModules) AndroidMk() android.AndroidMkData {
 
 			fmt.Fprintln(w, name+":", "$("+makevar+")")
 			fmt.Fprintln(w, ".PHONY:", name)
+			// TODO(b/151177513): Licenses: Doesn't go through base_rules. May have to generate meta_lic and meta_module here.
 		},
 	}
 }