Added suggestions for gestures.

Bug: 30986021
Test: manual + make RunSettingsRoboTests + adb shell am instrument -w
com.android.settings.tests.unit /android.support.test.runner.AndroidJUnitRunner

Change-Id: I7aed110c81ca2fb6b90e2f359b4bb941c02bc1c3

src/com/android/settings/gestures/DoubleTapScreenSettings.java

@@ -17,6 +17,7 @@
 package com.android.settings.gestures;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.UserHandle;
 import android.provider.SearchIndexableResource;
 
@@ -24,6 +25,8 @@ import com.android.internal.hardware.AmbientDisplayConfiguration;
 import com.android.internal.logging.nano.MetricsProto;
 import com.android.settings.R;
 import com.android.settings.dashboard.DashboardFragment;
+import com.android.settings.dashboard.suggestions.SuggestionFeatureProvider;
+import com.android.settings.overlay.FeatureFactory;
 import com.android.settings.search.BaseSearchIndexProvider;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.core.lifecycle.Lifecycle;
@@ -37,6 +40,18 @@ public class DoubleTapScreenSettings extends DashboardFragment {
     private static final String TAG = "DoubleTapScreen";
     private static final String KEY_DOUBLE_TAP_SCREEN = "gesture_double_tap_screen";
 
+    public static final String PREF_KEY_SUGGESTION_COMPLETE =
+            "pref_double_tap_screen_suggestion_complete";
+
+    @Override
+    public void onAttach(Context context) {
+        super.onAttach(context);
+        SuggestionFeatureProvider suggestionFeatureProvider = FeatureFactory.getFactory(context)
+                .getSuggestionFeatureProvider(context);
+        SharedPreferences prefs = suggestionFeatureProvider.getSharedPrefs(context);
+        prefs.edit().putBoolean(PREF_KEY_SUGGESTION_COMPLETE, true).apply();
+    }
+
     @Override
     public int getMetricsCategory() {
         return MetricsProto.MetricsEvent.SETTINGS_GESTURE_DOUBLE_TAP_SCREEN;