miatoll: Import Keyhandler from Davinci

https://github.com/ArianK16a/android_device_xiaomi_davinci

This tells Inputdispatcher to ignore inputs from our Fingerprint scanner, as that seems to be causing ANRs

BoardConfig.mk

@@ -206,6 +206,9 @@ BOARD_SEPOLICY_DIRS += $(DEVICE_PATH)/sepolicy/vendor
 # Side FP key for InputDispatcher to skip
 TARGET_INPUTDISPATCHER_SKIP_EVENT_KEY := 96
 
+# Side FP key for InputDispatcher to skip
+TARGET_INPUTDISPATCHER_SKIP_EVENT_KEY := 96
+
 # Verified Boot
 BOARD_AVB_ENABLE := true
 BOARD_AVB_MAKE_VBMETA_IMAGE_ARGS += --set_hashtree_disabled_flag

device.mk

@@ -230,6 +230,10 @@ PRODUCT_PACKAGES += \
 PRODUCT_COPY_FILES += \
     frameworks/native/data/etc/android.hardware.consumerir.xml:$(TARGET_COPY_OUT_VENDOR)/etc/permissions/android.hardware.consumerir.xml
 
+# KeyHandler
+PRODUCT_PACKAGES += \
+    KeyHandler
+
 # Light
 PRODUCT_PACKAGES += \
     android.hardware.light@2.0-service.xiaomi_sm6250

keyhandler/Android.mk

@@ -0,0 +1,21 @@
+#
+# Copyright (C) 2021 The LineageOS Project
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+LOCAL_PACKAGE_NAME := KeyHandler
+
+LOCAL_CERTIFICATE := platform
+LOCAL_PRIVATE_PLATFORM_APIS := true
+LOCAL_PRIVILEGED_MODULE := true
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_PROGUARD_FLAG_FILES := proguard.flags
+
+include $(BUILD_PACKAGE)

keyhandler/AndroidManifest.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+     Copyright (C) 2021 The LineageOS Project
+
+     SPDX-License-Identifier: Apache-2.0
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          android:sharedUserId="android.uid.system"
+          package="org.lineageos.keyhandler">
+</manifest>

keyhandler/proguard.flags

@@ -0,0 +1,4 @@
+# Keep keyhandler constructor
+-keep public class * implements com.android.internal.os.DeviceKeyHandler {
+    public <init>(android.content.Context);
+}

keyhandler/src/org/lineageos/keyhandler/KeyHandler.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package org.lineageos.keyhandler;
+
+import android.content.Context;
+import android.util.Log;
+import android.view.KeyEvent;
+
+import com.android.internal.os.DeviceKeyHandler;
+
+public class KeyHandler implements DeviceKeyHandler {
+    private static final String TAG = "KeyHandler";
+    private static final int KEYCODE_SIDE_FP = 96;
+
+    public KeyHandler(Context context) {
+        Log.i(TAG, "KeyHandler constructor called");
+    }
+
+    public KeyEvent handleKeyEvent(KeyEvent event) {
+        int scanCode = event.getScanCode();
+        Log.i(TAG, "handleKeyEvent=" + scanCode);
+        switch (scanCode) {
+            case KEYCODE_SIDE_FP:
+                return null;
+            default:
+                return event;
+        }
+    }
+}