Implement "premium price ack required" checkbox

Implement a checkbox in the "Resources" tab to allow registrars to toggle
their "premium price ack required" flag.

Tested:
  Verfied the console functionality by hand.  I've started work on an
  automated test, but we can't actually test those from blaze and the
  kokoro tests are way too time-consuming to be practical for development, so
  we're going to have to either find a way to run those locally outside of
  the normal process or make do without a test.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=190212177

java/google/registry/module/frontend/FrontendRequestComponent.java

@@ -40,6 +40,7 @@ import google.registry.request.RequestScope;
 import google.registry.ui.server.registrar.ConsoleUiAction;
 import google.registry.ui.server.registrar.RegistrarPaymentAction;
 import google.registry.ui.server.registrar.RegistrarPaymentSetupAction;
+import google.registry.ui.server.registrar.RegistrarPremiumPriceAckAction;
 import google.registry.ui.server.registrar.RegistrarSettingsAction;
 import google.registry.whois.WhoisHttpServer;
 import google.registry.whois.WhoisModule;
@@ -66,6 +67,7 @@ interface FrontendRequestComponent {
   RdapAutnumAction rdapAutnumAction();
   RegistrarPaymentAction registrarPaymentAction();
   RegistrarPaymentSetupAction registrarPaymentSetupAction();
+  RegistrarPremiumPriceAckAction registrarPremiumPriceAckAction();
   RegistrarSettingsAction registrarSettingsAction();
   RdapDomainAction rdapDomainAction();
   RdapDomainSearchAction rdapDomainSearchAction();