Revert of precache: Move the java files into //components/precache/android

components/precache/android/BUILD.gn

-# Copyright 2015 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/android/rules.gni")
-
-# GYP: //components/precache.gypi:precache_java
-android_library("precache_java") {
-  deps = [
-    "//base:base_java",
-  ]
-  DEPRECATED_java_in_dir = "java/src"
-}
-
-android_library("precache_javatests") {
-  deps = [
-    "//base:base_java_test_support",
-    ":precache_java",
-  ]
-  DEPRECATED_java_in_dir = "javatests/src"
-}