Add a suggestion: showing new device features

- New suggestion activity
- Removed useless api SuggestionFeatureProvider.isPresent().

- Also updated support activity search indexing icon and summary

Change-Id: Ib52cf26a985f57bf0aac918606b10f75bd024639
Fix: 62034077
Fix: 62196070
Test: make RunSettingsRoboTests

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

@@ -68,6 +68,8 @@ public class SupportDashboardActivity extends Activity implements Indexable {
                     SearchIndexableRaw data = new SearchIndexableRaw(context);
                     data.title = context.getString(R.string.page_tab_title_support);
                     data.screenTitle = context.getString(R.string.settings_label);
+                    data.summaryOn = context.getString(R.string.support_summary);
+                    data.iconResId = R.drawable.ic_help;
                     data.intentTargetPackage = context.getPackageName();
                     data.intentTargetClass = SupportDashboardActivity.class.getName();
                     data.intentAction = Intent.ACTION_MAIN;