Updated privacy settings to launch custom content capture settings when available.

Test: manual verification
Test: atest EnableContentCapturePreferenceControllerTest \
      CtsContentTestCases:android.content.cts.AvailableIntentsTest#testRequestEnableContentCaptureIntent
Test: adb shell am start-activity -a android.settings.REQUEST_ENABLE_CONTENT_CAPTURE

Fixes: 119264902

Change-Id: I2a030c31d966d40feb6ba449e4bbc9ef8cf0565b

src/com/android/settings/utils/ContentCaptureUtils.java

@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2019 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.settings.utils;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.ComponentName;
+import android.content.Context;
+import android.os.IBinder;
+import android.os.ServiceManager;
+import android.os.UserHandle;
+import android.provider.Settings;
+import android.util.Log;
+import android.view.contentcapture.ContentCaptureManager;
+
+public final class ContentCaptureUtils {
+
+    private static final String TAG = ContentCaptureUtils.class.getSimpleName();
+    private static final int MY_USER_ID = UserHandle.myUserId();
+
+    public static boolean isEnabledForUser(@NonNull Context context) {
+        boolean enabled = Settings.Secure.getIntForUser(context.getContentResolver(),
+                Settings.Secure.CONTENT_CAPTURE_ENABLED, 1, MY_USER_ID) == 1;
+        return enabled;
+    }
+
+    public static void setEnabledForUser(@NonNull Context context, boolean enabled) {
+        Settings.Secure.putIntForUser(context.getContentResolver(),
+                Settings.Secure.CONTENT_CAPTURE_ENABLED, enabled ? 1 : 0, MY_USER_ID);
+    }
+
+    public static boolean isFeatureAvailable() {
+        // We cannot look for ContentCaptureManager, because it's not available if the service
+        // didn't whitelist Settings
+        IBinder service = ServiceManager.checkService(Context.CONTENT_CAPTURE_MANAGER_SERVICE);
+        return service != null;
+    }
+
+    @Nullable
+    public static ComponentName getServiceSettingsComponentName() {
+        try {
+            return ContentCaptureManager.getServiceSettingsComponentName();
+        } catch (RuntimeException e) {
+            Log.w(TAG, "Could not get service settings: " + e);
+            return null;
+        }
+    }
+
+    private ContentCaptureUtils() {
+        throw new UnsupportedOperationException("contains only static methods");
+    }
+}