Add libandroidfw_tests to device-tests suite

For it to be included in device-tests.zip to run test in a suite.

Bug: none
Test: none
Change-Id: Ic20bede356f82a80582acb3883ad1ab9e76a6bdc
diff --git a/libs/androidfw/Android.bp b/libs/androidfw/Android.bp
index 98af3eb..eeaefc5 100644
--- a/libs/androidfw/Android.bp
+++ b/libs/androidfw/Android.bp
@@ -167,6 +167,7 @@
         },
     },
     data: ["tests/data/**/*.apk"],
+    test_suites: ["device-tests"],
 }
 
 cc_benchmark {