Add GN targets for AppRTC Demo on Android.

webrtc/base/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/crypto.gni")
 import("//build/config/ui.gni")
 import("../build/webrtc.gni")
 
 import("//build_overrides/webrtc.gni")
 
+if (is_android) {
+  import("//build/config/android/config.gni")
+  import("//build/config/android/rules.gni")
+}
+
 config("rtc_base_approved_all_dependent_config") {
   if (is_mac && !build_with_chromium) {
     libs = [ "Foundation.framework" ]  # needed for logging_mac.mm
   }
 }
 
 config("rtc_base_config") {
   include_dirs = [
     "//third_party/jsoncpp/overrides/include",
     "//third_party/jsoncpp/source/include",
@@ skipping 647 matching lines @@
     deps = [
       ":rtc_base",
       "../test:field_trial",
       "../test:test_support",
     ]
     public_deps = [
       "//testing/gtest",
     ]
   }
 }
+
+if (is_android) {
+  android_library("base_java") {
+    java_files = [
+      "java/src/org/webrtc/Logging.java",
+      "java/src/org/webrtc/Size.java",
+      "java/src/org/webrtc/ThreadUtils.java",
+    ]
+
+    deps = [
+      "//base:base_java",
+    ]
+  }
+}