Convert some component source sets to static library

components/proximity_auth/ble/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//testing/test.gni")
 
-source_set("ble") {
+static_library("ble") {
   sources = [
     "bluetooth_low_energy_characteristics_finder.cc",
     "bluetooth_low_energy_characteristics_finder.h",
     "bluetooth_low_energy_connection.cc",
     "bluetooth_low_energy_connection.h",
     "bluetooth_low_energy_connection_finder.cc",
     "bluetooth_low_energy_connection_finder.h",
     "bluetooth_low_energy_device_whitelist.cc",
     "bluetooth_low_energy_device_whitelist.h",
     "bluetooth_low_energy_weave_defines.h",
@@ skipping 46 matching lines @@
     "//components/proximity_auth:test_support",
     "//device/bluetooth:mocks",
     "//testing/gmock",
     "//testing/gtest",
   ]
 
   public_deps = [
     "//components/proximity_auth/cryptauth/proto",
   ]
 }