Created libattestation

Move attestation logic from input into separate library. This way Input
and SurfaceFlinger can leverage the same logic

Test: inputflinger_test
Test: attestation_tests
Bug: 155825630
Change-Id: Ia4f65166da8a1c53a9570db59eab602190438696
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 51910fe..692c65d 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -17,6 +17,7 @@
 #define LOG_TAG "Input"
 //#define LOG_NDEBUG 0
 
+#include <attestation/HmacKeyManager.h>
 #include <cutils/compiler.h>
 #include <limits.h>
 #include <string.h>