Added fuzzers for libkeymaster4support

This patch adds following fuzz targets: keymaster4_attestation_fuzzer, keymaster4_authSet_fuzzer and keymaster4_utils_fuzzer

Test: ./keymaster4_attestation_fuzzer
Test: ./keymaster4_authSet_fuzzer
Test: ./keymaster4_utils_fuzzer
Bug: 189053968

Change-Id: Ieca5ba012f395a25cca9e37856d197031daf7dd9
diff --git a/keymaster/4.0/support/fuzzer/Android.bp b/keymaster/4.0/support/fuzzer/Android.bp
new file mode 100644
index 0000000..57a2d26
--- /dev/null
+++ b/keymaster/4.0/support/fuzzer/Android.bp
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2021 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.
+ *
+ */
+
+cc_defaults {
+    name: "keymaster4_fuzzer_defaults",
+    static_libs: [
+        "libbase",
+        "liblog",
+        "libkeymaster4support",
+        "libutils",
+    ],
+    shared_libs: [
+        "android.hardware.keymaster@4.0",
+        "libcrypto",
+        "libhidlbase",
+    ],
+    fuzz_config: {
+        cc: [
+            "android-media-fuzzing-reports@google.com",
+        ],
+        componentid: 533764,
+    },
+}
+
+cc_fuzz {
+    name: "keymaster4_attestation_fuzzer",
+    defaults: [
+        "keymaster4_fuzzer_defaults",
+    ],
+    srcs: [
+        "keymaster4_attestation_fuzzer.cpp",
+    ],
+}
+
+cc_fuzz {
+    name: "keymaster4_authSet_fuzzer",
+    defaults: [
+        "keymaster4_fuzzer_defaults",
+    ],
+    srcs: [
+        "keymaster4_authSet_fuzzer.cpp",
+    ],
+}
+
+cc_fuzz {
+    name: "keymaster4_utils_fuzzer",
+    defaults: [
+        "keymaster4_fuzzer_defaults",
+    ],
+    srcs: [
+        "keymaster4_utils_fuzzer.cpp",
+    ],
+}