fingerprint: Add __system_property_get() shim for certain FOD impls

It seems like OnePlus 7 and 8 series sadly depend on these props.

Change-Id: I728a9ea63ded6c79873dd7350a06cc1f40ca92b7

hidl/fingerprint/Android.bp

@@ -21,6 +21,16 @@ cc_binary {
     header_libs: ["kernel_headers.oplus"],
 }
 
+cc_library {
+    name: "libshims_fingerprint.oplus",
+    srcs: ["BiometricsFingerprintShim.cpp"],
+    shared_libs: [
+        "libcutils",
+        "liblog",
+    ],
+    device_specific: true,
+}
+
 cc_library_static {
     name: "libudfps_extension.oplus",
     srcs: ["UdfpsExtension.cpp"],

hidl/fingerprint/BiometricsFingerprintShim.cpp

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 The LineageOS 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.
+ */
+
+#define LOG_TAG "libshims_fingerprint.oplus"
+
+#include <cutils/log.h>
+
+#include <dlfcn.h>
+#include <string.h>
+
+extern "C" int __system_property_get(const char* __name, char* __value) {
+    static auto __system_property_get_orig = reinterpret_cast<typeof(__system_property_get)*>(
+            dlsym(RTLD_NEXT, "__system_property_get"));
+
+    if (strcmp(__name, "ro.boot.vbmeta.device_state") == 0) {
+        ALOGV("Returning unlocked for ro.boot.vbmeta.device_state");
+        return strlen(strcpy(__value, "unlocked"));
+    }
+
+    if (strcmp(__name, "ro.boot.verifiedbootstate") == 0) {
+        ALOGV("Returning orange for ro.boot.verifiedbootstate");
+        return strlen(strcpy(__value, "orange"));
+    }
+
+    return __system_property_get_orig(__name, __value);
+}