Implement Settings UI for Screen zoom preference

Also cleans up unnecessary 0s and moves tint to the proper place in
relevant vector drawable XML files.

Preview layout is still WIP pending UX input, but I wanted to get this
CL in place so that we can test/demo the feature ASAP.

Bug: 22450672
Change-Id: Ic3f1500006c763df99fba2d1d16782b89d6fcae1

src/com/android/settings/search/SearchIndexableResources.java

@@ -38,6 +38,7 @@ import com.android.settings.applications.AdvancedAppSettings;
 import com.android.settings.applications.ManageDefaultApps;
 import com.android.settings.bluetooth.BluetoothSettings;
 import com.android.settings.deviceinfo.StorageSettings;
+import com.android.settings.display.ScreenZoomSettings;
 import com.android.settings.fuelgauge.BatterySaverSettings;
 import com.android.settings.fuelgauge.PowerUsageSummary;
 import com.android.settings.inputmethod.InputMethodAndLanguageSettings;
@@ -131,6 +132,13 @@ public final class SearchIndexableResources {
                         HomeSettings.class.getName(),
                         R.drawable.ic_settings_home));
 
+        sResMap.put(ScreenZoomSettings.class.getName(),
+                new SearchIndexableResource(
+                        Ranking.getRankForClassName(ScreenZoomSettings.class.getName()),
+                        NO_DATA_RES_ID,
+                        ScreenZoomSettings.class.getName(),
+                        R.drawable.ic_settings_display));
+
         sResMap.put(DisplaySettings.class.getName(),
                 new SearchIndexableResource(
                         Ranking.getRankForClassName(DisplaySettings.class.getName()),