[DeviceService] Cleanup of android library dependencies.

services/device/time_zone_monitor/BUILD.gn

 # Copyright 2016 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("//build/config/features.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
 
@@ skipping 43 matching lines @@
 }
 
 if (is_android) {
   generate_jni("time_zone_monitor_jni_headers") {
     visibility = [ ":time_zone_monitor" ]
     sources = [
       "android/java/src/org/chromium/device/time_zone_monitor/TimeZoneMonitor.java",
     ]
     jni_package = "time_zone_monitor"
   }
+
+  android_library("java") {
+    # Conceptually, this should be visible only to //services/device:java.
+    # However, various generated targets also need to see this target as a
+    # result of //services/device:java depending on it.
+    visibility = [ "//services/device:*" ]
+    java_files = [ "android/java/src/org/chromium/device/time_zone_monitor/TimeZoneMonitor.java" ]
+    deps = [
+      "//base:base_java",
+    ]
+  }
 }