Add Keymaster 4.1

Note that CL is missing complete tests (what's included is just a
stub, really) and support library code.  All of that will come in
near-future CLs.  This CL omits them because they'll take time and
there's a need to unblock Keymaster 4.1 implementers now.

Bug: 140193672
Bug: 140192237
Bug: 140824829
Test: Will be in a future CL
Change-Id: I0e6e3a38356f0517158a10604b549415641ad1b9
diff --git a/keymaster/4.1/Android.bp b/keymaster/4.1/Android.bp
new file mode 100644
index 0000000..eaa7e41
--- /dev/null
+++ b/keymaster/4.1/Android.bp
@@ -0,0 +1,19 @@
+// This file is autogenerated by hidl-gen -Landroidbp.
+
+hidl_interface {
+    name: "android.hardware.keymaster@4.1",
+    root: "android.hardware",
+    vndk: {
+        enabled: true,
+    },
+    srcs: [
+        "types.hal",
+        "IKeymasterDevice.hal",
+        "IOperation.hal",
+    ],
+    interfaces: [
+        "android.hardware.keymaster@4.0",
+        "android.hidl.base@1.0",
+    ],
+    gen_java: false,
+}