Add keywords for search terms

A large update for search keywords collected from logging
and individual feedback.

At the moment, we don't have a great way to test that a keyword
matches to a search result. It's a bit akin to testing that the
wifi title is Wifi.

Fixes: 36983488
Fixes: 36622889
Fixes: 76115241
Test: Manual audit of keywords surfacing the proper results.
Change-Id: Ia1031b7f6ec1edfcc28c07e6b55049b8dac7c685

src/com/android/settings/deviceinfo/StorageSettings.java

@@ -571,6 +571,7 @@ public class StorageSettings extends SettingsPreferenceFragment implements Index
                     data.title = context.getString(R.string.storage_settings);
                     data.key = "storage_settings";
                     data.screenTitle = context.getString(R.string.storage_settings);
+                    data.keywords = context.getString(R.string.keywords_storage_settings);
                     result.add(data);
 
                     data = new SearchIndexableRaw(context);