Add ability to switch between support versions

Creates a trampoline activity and adds functionality
to the SupportFeatureProvider interface so that we can
conditionally launch support V1 or V2.

Test: Test in ag/2144016
Bug: 37306241
Change-Id: I6d24e65cad91692e457ea216713e90239845b4f5

src/com/android/settings/core/gateway/SettingsGateway.java

@@ -260,7 +260,6 @@ public class SettingsGateway {
             Settings.SecuritySettingsActivity.class.getName(),
             Settings.AccessibilitySettingsActivity.class.getName(),
             Settings.SystemDashboardActivity.class.getName(),
-            Settings.SupportDashboardActivity.class.getName(),
             // Home page > Network & Internet
             Settings.WifiSettingsActivity.class.getName(),
             Settings.DataUsageSummaryActivity.class.getName(),