dubai: Add UDFPS extension library

* Mark the pressed fingerprint layer.

Change-Id: I49891f89350839ff93ff1a762a83996bfd56ec18

fingerprint/Android.bp

@@ -19,3 +19,14 @@ cc_binary {
         "android.hardware.biometrics.fingerprint@2.3",
     ],
 }
+
+cc_library_static {
+    name: "libudfps_extension.dubai",
+    srcs: ["UdfpsExtension.cpp"],
+    include_dirs: [
+        "frameworks/native/services/surfaceflinger/CompositionEngine/include"
+    ],
+    header_libs: [
+        "generated_kernel_headers",
+    ],
+}

fingerprint/UdfpsExtension.cpp

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2022 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <compositionengine/UdfpsExtension.h>
+#include <display/drm/sde_drm.h>
+
+uint32_t getUdfpsZOrder(uint32_t z, bool touched) {
+    if (touched) {
+        z |= FOD_PRESSED_LAYER_ZORDER;
+    }
+    return z;
+}
+
+uint64_t getUdfpsUsageBits(uint64_t usageBits, bool) {
+    return usageBits;
+}