[fuchsia] Bump Fuchsia's API level to 16

shell/platform/fuchsia/dart_runner/dart_component_controller.cc

@@ -216,9 +216,14 @@ bool DartComponentController::CreateAndBindNamespace() {
   fdio_service_connect_at(dart_outgoing_dir_ptr_.channel().get(), "svc",
                           dart_public_dir.NewRequest().TakeChannel().release());
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
   auto composed_service_dir = std::make_unique<vfs::ComposedServiceDir>();
   composed_service_dir->set_fallback(std::move(dart_public_dir));
 
+#pragma clang diagnostic pop
+
   // Clone and check if client is servicing the directory.
   dart_outgoing_dir_ptr_->Clone(
       fuchsia::io::OpenFlags::DESCRIBE |

shell/platform/fuchsia/flutter/component_v2.cc

@@ -259,9 +259,14 @@ ComponentV2::ComponentV2(
   fdio_service_connect_at(directory_ptr_.channel().get(), "svc",
                           request.release());
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
   auto composed_service_dir = std::make_unique<vfs::ComposedServiceDir>();
   composed_service_dir->set_fallback(std::move(flutter_public_dir));
 
+#pragma clang diagnostic pop
+
   // Clone and check if client is servicing the directory.
   directory_ptr_->Clone(fuchsia::io::OpenFlags::DESCRIBE |
                             fuchsia::io::OpenFlags::CLONE_SAME_RIGHTS,

shell/platform/fuchsia/runtime/dart/utils/vmservice_object.h

@@ -9,6 +9,9 @@
 
 namespace dart_utils {
 
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated-declarations"
+
 class VMServiceObject : public vfs::LazyDir {
  public:
   static constexpr const char* kDirName = "DartVM";
@@ -21,6 +24,8 @@ class VMServiceObject : public vfs::LazyDir {
                       std::string name) const override;
 };
 
+#pragma clang diagnostic pop
+
 }  // namespace dart_utils
 
 #endif  // FLUTTER_SHELL_PLATFORM_FUCHSIA_RUNTIME_DART_UTILS_VMSERVICE_OBJECT_H_

tools/fuchsia/target_api_level

@@ -1 +1 @@
-15
+16