Create dart proto for transferring the data from C++ to flutter app.

- callback: transfer device C++ proto to dart proto
 - device: transfer metadata that get from the observer to dart proto
 - enum: transfer Discovery Action class to dart proto

PiperOrigin-RevId: 538935072

fastpair/dart/proto/BUILD

@@ -0,0 +1,63 @@
+# Copyright 2023 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+load("//dart:build_defs.bzl", "dart_proto_library")
+load("@rules_cc//cc:defs.bzl", "cc_proto_library")
+
+licenses(["notice"])
+
+proto_library(
+    name = "fastpair_callback_proto",
+    srcs = [
+        "callbacks.proto",
+    ],
+    deps = [
+        "//fastpair/proto:fastpair_proto",
+    ],
+)
+
+proto_library(
+    name = "fastpair_device_proto",
+    srcs = [
+        "device.proto",
+    ],
+)
+
+proto_library(
+    name = "fastpair_enum_proto",
+    srcs = [
+        "enum.proto",
+    ],
+)
+
+proto_library(
+    name = "fastpair_proto",
+    deps = [
+        ":fastpair_callback_proto",
+        ":fastpair_device_proto",
+        ":fastpair_enum_proto",
+    ],
+)
+
+cc_proto_library(
+    name = "fastpair_cc_proto",
+    visibility = ["//visibility:public"],
+    deps = [":fastpair_proto"],
+)
+
+dart_proto_library(
+    name = "fastpair_dart_proto",
+    visibility = ["//visibility:public"],
+    deps = [":fastpair_proto"],
+)

fastpair/dart/proto/callbacks.proto

@@ -0,0 +1,29 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package nearby.fastpair.dart.proto;
+
+import "third_party/nearby/fastpair/proto/fastpair_rpcs.proto";
+
+// NextId: 2
+message CallbackData {
+  string message = 1;
+}
+
+// NextId: 2
+message DeviceDownloadedCallbackData {
+  repeated nearby.fastpair.proto.Device devices = 1;
+}

fastpair/dart/proto/device.proto

@@ -0,0 +1,26 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package nearby.fastpair.dart.proto;
+
+// Describes a FastPair scanned device. The device class will have more
+// properties and methods in the future based on the new feature added.
+// NextId: 4
+message Device {
+  string id = 1;  // The unique identifier of the device.
+  string name = 2;
+  string image_url = 3;
+}

fastpair/dart/proto/enum.proto

@@ -0,0 +1,34 @@
+// Copyright 2023 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package nearby.fastpair.dart.proto;
+
+// Represents the action after discovery
+enum DiscoveryAction {
+  // Uknown
+  DISCOVERY_ACTION_UNKNOWN = 0;
+  // User is willing to pair the discovered device and clicks the connect button
+  DISCOVERY_ACTION_PAIR_TO_DEVICE = 1;
+  // User is not willing to pair the discovered device and manually dismiss the
+  // notification
+  DISCOVERY_ACTION_DISMISSED_BY_USER = 2;
+  // OS dismissed
+  DISCOVERY_ACTION_DISSMISSED_BY_OS = 3;
+  // User clicks the learn more button
+  DISCOVERY_ACTION_LEARN_MORE = 4;
+  // Time out and dismissed automatically
+  DISCOVERY_ACTION_DISMISSED_BY_TIMEOUT = 5;
+}

fastpair/proto/BUILD

@@ -8,6 +8,9 @@ proto_library(
         "data.proto",
         "fastpair_rpcs.proto",
     ],
+    visibility = [
+        "//fastpair:__subpackages__",
+    ],
 )
 
 cc_proto_library(

fastpair/proto/fastpair_rpcs.proto

@@ -18,8 +18,6 @@ package nearby.fastpair.proto;
 
 import "third_party/nearby/fastpair/proto/data.proto";
 
-option optimize_for = LITE_RUNTIME;
-
 // Represents the type of device that is being registered.
 enum DeviceType {
   // Unspecified device type.