Reinstate C++ KeyMint impl as default

This is a partial revert of aosp/2856649, changeID
Ia450e9a8f2dc530f79e8d74d7ce65f7d67ea129f, because it turns out
that there are Wear devices that are using the default implementation
(but which are not covered by TreeHugger/presubmit).

It restores the C++ implementation for KeyMint as
android.hardware.security.keymint-service, but preserves the Rust
libraries that were moved here in that CL as a subsequent CL
(aosp/2852598) means that Cuttlefish now uses the libraries here.

Test: VtsAidlKeyMintTargetTest on Cuttlefish
Bug: 328251011
Bug: 314513765
Change-Id: Id6f3491144588e418cd6e18e51262fe839bfdf39
diff --git a/security/keymint/aidl/default/Android.bp b/security/keymint/aidl/default/Android.bp
index d815ff7..122a421 100644
--- a/security/keymint/aidl/default/Android.bp
+++ b/security/keymint/aidl/default/Android.bp
@@ -7,9 +7,48 @@
     default_applicable_licenses: ["hardware_interfaces_license"],
 }
 
-rust_binary {
+cc_binary {
     name: "android.hardware.security.keymint-service",
     relative_install_path: "hw",
+    init_rc: ["android.hardware.security.keymint-service.rc"],
+    vintf_fragments: [
+        "android.hardware.security.keymint-service.xml",
+        "android.hardware.security.sharedsecret-service.xml",
+        "android.hardware.security.secureclock-service.xml",
+    ],
+    vendor: true,
+    cflags: [
+        "-Wall",
+        "-Wextra",
+    ],
+    defaults: [
+        "keymint_use_latest_hal_aidl_ndk_shared",
+    ],
+    shared_libs: [
+        "android.hardware.security.rkp-V3-ndk",
+        "android.hardware.security.sharedsecret-V1-ndk",
+        "android.hardware.security.secureclock-V1-ndk",
+        "libbase",
+        "libbinder_ndk",
+        "libcppbor_external",
+        "libcrypto",
+        "libkeymaster_portable",
+        "libkeymint",
+        "liblog",
+        "libpuresoftkeymasterdevice",
+        "libutils",
+    ],
+    srcs: [
+        "service.cpp",
+    ],
+    required: [
+        "android.hardware.hardware_keystore.xml",
+    ],
+}
+
+rust_binary {
+    name: "android.hardware.security.keymint-service.nonsecure",
+    relative_install_path: "hw",
     vendor: true,
     init_rc: ["android.hardware.security.keymint-service.rc"],
     vintf_fragments: [