Make test_options.timeout an int64

Test: m RunSettingsRoboTests
Change-Id: I979268540fb50a22316223f432d3c6cbb259f61a
diff --git a/tests/robotests/Android.bp b/tests/robotests/Android.bp
index d63f3ba..f3312d2 100644
--- a/tests/robotests/Android.bp
+++ b/tests/robotests/Android.bp
@@ -19,6 +19,6 @@
     instrumentation_for: "Settings",
 
     test_options: {
-        timeout: "36000",
+        timeout: 36000,
     },
 }