Remove unnecessary "_external" suffix from libcppbor

Test: Build
Change-Id: Ied163d1f40c3b86d7b85cae1700310f5cb674e2d
diff --git a/identity/aidl/vts/Android.bp b/identity/aidl/vts/Android.bp
index 6f7ab54..8ff2382 100644
--- a/identity/aidl/vts/Android.bp
+++ b/identity/aidl/vts/Android.bp
@@ -42,7 +42,7 @@
         "android.hardware.security.rkp-V3-cpp",
         "android.hardware.security.rkp-V3-ndk",
         "android.hardware.security.secureclock-V1-ndk",
-        "libcppbor_external",
+        "libcppbor",
         "libcppcose_rkp",
         "libkeymaster_portable",
         "libkeymint_vts_test_utils",