Add input flags for event verification

We will try to roll them out to improve the correctness of the input
streams.

Bug: 271455682
Test: atest inputflinger_tests
Change-Id: I03ad327cf86b19220b5a6344b77b446dd7360ab9
diff --git a/libs/input/tests/Android.bp b/libs/input/tests/Android.bp
index e7224ff..138898f 100644
--- a/libs/input/tests/Android.bp
+++ b/libs/input/tests/Android.bp
@@ -62,6 +62,7 @@
         "libtinyxml2",
         "libutils",
         "libvintf",
+        "server_configurable_flags",
     ],
     data: [
         "data/*",