Change to device-tests

In cf, signing key has been changed to dev key. So LibStatsPullTests
tests is changed to device-tests.

Change-Id: I5971ae584afeebccc0ba3ed55e6579858666db79
Bug: 153482272
Test: m -j
diff --git a/apex/statsd/tests/libstatspull/Android.bp b/apex/statsd/tests/libstatspull/Android.bp
index 2d64f19..0df96e1 100644
--- a/apex/statsd/tests/libstatspull/Android.bp
+++ b/apex/statsd/tests/libstatspull/Android.bp
@@ -32,7 +32,7 @@
         "protos/**/*.proto",
         ],
     test_suites: [
-        "general-tests",
+        "device-tests",
     ],
     platform_apis: true,
     privileged: true,