Revert "Revert "API Lint: Enable for TestApi""

This reverts commit 718428355f.

Fixes: 139833475
Test: make droid
Change-Id: I61316a8f314dccb7718bf8ab159e167d554d2525

Android.bp

@@ -1516,6 +1516,10 @@ droidstubs {
             api_file: "api/test-current.txt",
             removed_api_file: "api/test-removed.txt",
         },
+        api_lint: {
+            enabled: true,
+            baseline_file: "api/test-lint-baseline.txt",
+        },
     },
 }