libbinder_ndk_unit_test: force auto-gen config

This test was picking up the AndroidTest.xml here implicitly and running
the wrong test.

Bug: 148297225
Test: atest libbinder_ndk_unit_test
Change-Id: I58afe3d570a78fb0e06182a4e9c79e684db21064
diff --git a/libs/binder/ndk/test/Android.bp b/libs/binder/ndk/test/Android.bp
index 8c8382d..e598eec 100644
--- a/libs/binder/ndk/test/Android.bp
+++ b/libs/binder/ndk/test/Android.bp
@@ -60,6 +60,10 @@
     defaults: ["test_libbinder_ndk_test_defaults"],
     srcs: ["libbinder_ndk_unit_test.cpp"],
     test_suites: ["general-tests"],
+    require_root: true,
+
+    // force since binderVendorDoubleLoadTest has its own
+    auto_gen_config: true,
 }
 
 cc_test {