Create an utils for embedding activity feature

This is an utility class to access relevant embedding activity feature
supported by Settings.

Bug: 201722672
Test: manual test
1) Run the apk built with this utils, and check some features work well
on large screen

Change-Id: I9f2a1fff57632ca2841b61a862f107d7df735247
diff --git a/packages/SettingsLib/ActivityEmbedding/Android.bp b/packages/SettingsLib/ActivityEmbedding/Android.bp
new file mode 100644
index 0000000..fc82b79
--- /dev/null
+++ b/packages/SettingsLib/ActivityEmbedding/Android.bp
@@ -0,0 +1,21 @@
+package {
+    // See: http://go/android-license-faq
+    // A large-scale-change added 'default_applicable_licenses' to import
+    // all of the 'license_kinds' from "frameworks_base_license"
+    // to get the below license kinds:
+    //   SPDX-license-identifier-Apache-2.0
+    default_applicable_licenses: ["frameworks_base_license"],
+}
+
+android_library {
+    name: "SettingsLibActivityEmbedding",
+
+    srcs: ["src/**/*.java"],
+
+    static_libs: [
+        "androidx.annotation_annotation",
+        "SettingsLibUtils",
+    ],
+    sdk_version: "system_current",
+    min_sdk_version: "21",
+}
diff --git a/packages/SettingsLib/ActivityEmbedding/AndroidManifest.xml b/packages/SettingsLib/ActivityEmbedding/AndroidManifest.xml
new file mode 100644
index 0000000..2e6c405
--- /dev/null
+++ b/packages/SettingsLib/ActivityEmbedding/AndroidManifest.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  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.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.android.settingslib.activityembedding">
+
+    <uses-sdk android:minSdkVersion="21" />
+
+</manifest>
diff --git a/packages/SettingsLib/ActivityEmbedding/src/com/android/settingslib/activityembedding/ActivityEmbeddingUtils.java b/packages/SettingsLib/ActivityEmbedding/src/com/android/settingslib/activityembedding/ActivityEmbeddingUtils.java
new file mode 100644
index 0000000..36c2bda
--- /dev/null
+++ b/packages/SettingsLib/ActivityEmbedding/src/com/android/settingslib/activityembedding/ActivityEmbeddingUtils.java
@@ -0,0 +1,51 @@
+/*
+ * 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.
+ */
+
+package com.android.settingslib.activityembedding;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+
+import com.android.settingslib.utils.BuildCompatUtils;
+
+/**
+ * An util class collecting all common methods for the embedding activity features.
+ */
+public class ActivityEmbeddingUtils {
+    private static final String ACTION_SETTINGS_EMBED_DEEP_LINK_ACTIVITY =
+            "android.settings.SETTINGS_EMBED_DEEP_LINK_ACTIVITY";
+    private static final String PACKAGE_NAME_SETTINGS = "com.android.settings";
+
+    /**
+     * Whether to support embedding activity feature.
+     */
+    public static boolean isEmbeddingActivityEnabled(Context context) {
+        if (BuildCompatUtils.isAtLeastS()) {
+            final Intent intent = new Intent(ACTION_SETTINGS_EMBED_DEEP_LINK_ACTIVITY);
+            intent.setPackage(PACKAGE_NAME_SETTINGS);
+            final ResolveInfo resolveInfo =
+                    context.getPackageManager().resolveActivity(intent, 0 /* flags */);
+            return resolveInfo != null
+                    && resolveInfo.activityInfo != null
+                    && resolveInfo.activityInfo.enabled;
+        }
+        return false;
+    }
+
+    private ActivityEmbeddingUtils() {
+    }
+}