AttestationManager AIDL interfaces

Bug: 172192670
Test: m

Change-Id: If25ee4d1d47bb4d63279491e0a56bdea3dc4e6ab
diff --git a/keystore2/aidl/android/security/ByteArray.aidl b/keystore2/aidl/android/security/ByteArray.aidl
new file mode 100644
index 0000000..db2e18c
--- /dev/null
+++ b/keystore2/aidl/android/security/ByteArray.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.security;
+
+/**
+ * Simple data holder for a byte array, allowing for multidimensional arrays in AIDL.
+ *
+ * @hide
+ */
+parcelable ByteArray {
+    byte[] data;
+}
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