[Chrome OS Tether] Create BleAdvertisementDeviceQueue.

chromeos/components/tether/BUILD.gn

Index: chromeos/components/tether/BUILD.gn
diff --git a/chromeos/components/tether/BUILD.gn b/chromeos/components/tether/BUILD.gn
index 5ea6be44c519d60bbeab2177ba295466d5a3c209..5d9639497debc25cccd2b972f9c9e8bdf2c8e29f 100644
--- a/chromeos/components/tether/BUILD.gn
+++ b/chromeos/components/tether/BUILD.gn
@@ -6,6 +6,8 @@ assert(is_chromeos, "Non-ChromeOS builds cannot depend on //chromeos")
 
 static_library("tether") {
   sources = [
+    "ble_advertisement_device_queue.cc",
+    "ble_advertisement_device_queue.h",
     "initializer.cc",
     "initializer.h",
   ]
@@ -33,12 +35,16 @@ static_library("test_support") {
 source_set("unit_tests") {
   testonly = true
 
-  sources = []
+  sources = [
+    "ble_advertisement_device_queue_unittest.cc",
+  ]
 
   deps = [
     ":test_support",
     ":tether",
     "//base/test:test_support",
+    "//components/cryptauth:test_support",
+    "//testing/gmock",
     "//testing/gtest",
   ]
 }