Add ability to switch between support versions

Creates a trampoline activity and adds functionality
to the SupportFeatureProvider interface so that we can
conditionally launch support V1 or V2.

Test: Test in ag/2144016
Bug: 37306241
Change-Id: I6d24e65cad91692e457ea216713e90239845b4f5

AndroidManifest.xml

@@ -2957,6 +2957,11 @@
                        android:value="com.android.settings.deletionhelper.AutomaticStorageManagerSettings" />
         </activity>
 
+        <activity android:name="Settings$LegacySupportActivity">
+            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
+            android:value="com.android.settings.dashboard.SupportFragment"/>
+        </activity>
+
         <!-- Information architecture host activities -->
 
         <!-- Alias for battery settings in new IA. Remove and merge metadata into TargetActivity -->
@@ -3006,17 +3011,16 @@
                        android:resource="@string/system_dashboard_summary"/>
         </activity>
 
-        <activity android:name=".Settings$SupportDashboardActivity"
+        <activity android:name=".dashboard.SupportDashboardActivity"
                   android:label="@string/page_tab_title_support"
                   android:icon="@drawable/ic_help"
+                  android:theme="@android:style/Theme.NoDisplay"
                   android:enabled="@bool/config_support_enabled">
             <intent-filter android:priority="-2">
                 <action android:name="com.android.settings.action.SETTINGS"/>
             </intent-filter>
             <meta-data android:name="com.android.settings.category"
                        android:value="com.android.settings.category.ia.homepage"/>
-            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
-                       android:value="com.android.settings.dashboard.SupportFragment"/>
             <meta-data android:name="com.android.settings.summary"
                        android:resource="@string/support_summary"/>
         </activity>

src/com/android/settings/Settings.java

@@ -168,6 +168,7 @@ public class Settings extends SettingsActivity {
         }
     }
     public static class WebViewAppPickerActivity extends SettingsActivity { /* empty */ }
+    public static class LegacySupportActivity extends SettingsActivity{ /* empty */ }
 
     // Top level categories for new IA
     public static class NetworkDashboardActivity extends SettingsActivity {}
@@ -176,6 +177,5 @@ public class Settings extends SettingsActivity {
     public static class StorageDashboardActivity extends SettingsActivity {}
     public static class UserAndAccountDashboardActivity extends SettingsActivity {}
     public static class SystemDashboardActivity extends SettingsActivity {}
-    public static class SupportDashboardActivity extends SettingsActivity {}
 
 }

src/com/android/settings/core/gateway/SettingsGateway.java

@@ -260,7 +260,6 @@ public class SettingsGateway {
             Settings.SecuritySettingsActivity.class.getName(),
             Settings.AccessibilitySettingsActivity.class.getName(),
             Settings.SystemDashboardActivity.class.getName(),
-            Settings.SupportDashboardActivity.class.getName(),
             // Home page > Network & Internet
             Settings.WifiSettingsActivity.class.getName(),
             Settings.DataUsageSummaryActivity.class.getName(),

src/com/android/settings/dashboard/SupportDashboardActivity.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2017 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.dashboard;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import com.android.settings.Settings.LegacySupportActivity;
+import com.android.settings.overlay.FeatureFactory;
+import com.android.settings.overlay.SupportFeatureProvider;
+
+/**
+ * Trampoline activity that decides which version of support should be shown to the user.
+ */
+public class SupportDashboardActivity extends Activity {
+
+    public SupportDashboardActivity() {}
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        SupportFeatureProvider supportFeatureProvider = FeatureFactory.getFactory(this)
+                .getSupportFeatureProvider(this);
+
+        // try to launch support v2 if we have the feature provider
+        if (supportFeatureProvider != null && supportFeatureProvider.isSupportV2Enabled()) {
+            supportFeatureProvider.startSupportV2(this);
+        } else {
+            startActivity(new Intent(this, LegacySupportActivity.class));
+        }
+        finish();
+    }
+}

src/com/android/settings/overlay/SupportFeatureProvider.java

@@ -128,6 +128,19 @@ public interface SupportFeatureProvider {
      */
     void startSupport(Activity activity, Account account, @SupportType int type);
 
+    /**
+     * Starts support v2, invokes the support home page. Will no-op if support v2 is not enabled.
+     *
+     * @param activity Calling activity.
+     */
+    void startSupportV2(Activity activity);
+
+    /**
+     * Checks if support v2 is enabled for this device.
+     * @return a boolean indicating if support v2 is enabled.
+     */
+    boolean isSupportV2Enabled();
+
     /**
      * Returns an {@link Intent} that opens help and allow user get help on sign in.
      */