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/DisplaySettings.java

@@ -124,7 +124,6 @@ public class DisplaySettings extends DashboardFragment {
                     List<String> keys = super.getNonIndexableKeys(context);
                     keys.add(KEY_DISPLAY_SIZE);
                     keys.add(WallpaperPreferenceController.KEY_WALLPAPER);
-                    keys.add(KEY_AMBIENT_DISPLAY);
                     keys.add(KEY_NIGHT_DISPLAY);
                     return keys;
                 }