Remove unnecessary "_external" suffix from libcppbor

Test: Build
Change-Id: Ied163d1f40c3b86d7b85cae1700310f5cb674e2d
diff --git a/security/rkp/aidl/vts/functional/Android.bp b/security/rkp/aidl/vts/functional/Android.bp
index 9c2b6e1..2cce8db 100644
--- a/security/rkp/aidl/vts/functional/Android.bp
+++ b/security/rkp/aidl/vts/functional/Android.bp
@@ -32,7 +32,7 @@
         "libcrypto",
     ],
     static_libs: [
-        "libcppbor_external",
+        "libcppbor",
         "libgmock_ndk",
         "libkeymint_vts_test_utils",
     ],