Updates for application extraction from //apps/modular (#3397)

diff --git a/content_handler/BUILD.gn b/content_handler/BUILD.gn
index 28a7616..f6291d8 100644
--- a/content_handler/BUILD.gn
+++ b/content_handler/BUILD.gn
@@ -32,7 +32,7 @@
   ]
 
   deps = [
-    "//apps/modular/lib/app",
+    "//application/lib/app",
     "//apps/mozart/lib/skia:vmo",
     "//apps/mozart/services/buffers",
     "//apps/mozart/services/buffers/cpp",
diff --git a/content_handler/app.h b/content_handler/app.h
index 82efc85..2514991 100644
--- a/content_handler/app.h
+++ b/content_handler/app.h
@@ -8,8 +8,8 @@
 #include <memory>
 #include <unordered_set>
 
-#include "apps/modular/lib/app/application_context.h"
-#include "apps/modular/services/application/application_runner.fidl.h"
+#include "application/lib/app/application_context.h"
+#include "application/services/application_runner.fidl.h"
 #include "flutter/content_handler/application_controller_impl.h"
 #include "flutter/content_handler/content_handler_thread.h"
 #include "lib/ftl/macros.h"
diff --git a/content_handler/application_controller_impl.cc b/content_handler/application_controller_impl.cc
index d724fa7..7120aaf 100644
--- a/content_handler/application_controller_impl.cc
+++ b/content_handler/application_controller_impl.cc
@@ -6,7 +6,7 @@
 
 #include <utility>
 
-#include "apps/modular/lib/app/connect.h"
+#include "application/lib/app/connect.h"
 #include "flutter/content_handler/app.h"
 #include "flutter/content_handler/runtime_holder.h"
 #include "lib/ftl/logging.h"
diff --git a/content_handler/application_controller_impl.h b/content_handler/application_controller_impl.h
index 18cae03..24a30f4 100644
--- a/content_handler/application_controller_impl.h
+++ b/content_handler/application_controller_impl.h
@@ -7,9 +7,9 @@
 
 #include <memory>
 
-#include "apps/modular/services/application/application_controller.fidl.h"
-#include "apps/modular/services/application/application_runner.fidl.h"
-#include "apps/modular/services/application/service_provider.fidl.h"
+#include "application/services/application_controller.fidl.h"
+#include "application/services/application_runner.fidl.h"
+#include "application/services/service_provider.fidl.h"
 #include "apps/mozart/services/views/view_provider.fidl.h"
 #include "lib/fidl/cpp/bindings/binding.h"
 #include "lib/fidl/cpp/bindings/binding_set.h"
diff --git a/content_handler/runtime_holder.cc b/content_handler/runtime_holder.cc
index e1a6457..96b5ebc 100644
--- a/content_handler/runtime_holder.cc
+++ b/content_handler/runtime_holder.cc
@@ -6,7 +6,7 @@
 
 #include <utility>
 
-#include "apps/modular/lib/app/connect.h"
+#include "application/lib/app/connect.h"
 #include "dart/runtime/include/dart_api.h"
 #include "flutter/assets/zip_asset_store.h"
 #include "flutter/common/threads.h"
diff --git a/content_handler/runtime_holder.h b/content_handler/runtime_holder.h
index 6912d5a..ff5002e 100644
--- a/content_handler/runtime_holder.h
+++ b/content_handler/runtime_holder.h
@@ -9,8 +9,8 @@
 
 #include <unordered_set>
 
-#include "apps/modular/services/application/application_environment.fidl.h"
-#include "apps/modular/services/application/service_provider.fidl.h"
+#include "application/services/application_environment.fidl.h"
+#include "application/services/service_provider.fidl.h"
 #include "apps/mozart/services/input/input_connection.fidl.h"
 #include "apps/mozart/services/views/view_manager.fidl.h"
 #include "flutter/assets/unzipper_provider.h"