Reland of "precache: Move the java files into //components/precache/android"

components/precache/android/BUILD.gn

Index: components/precache/android/BUILD.gn
diff --git a/third_party/android_data_chart/BUILD.gn b/components/precache/android/BUILD.gn
similarity index 50%
copy from third_party/android_data_chart/BUILD.gn
copy to components/precache/android/BUILD.gn
index e01c6002921ae3b2f2df4032a2d12ac3210f9698..537150b533b654e4708c4d0153b0ae47fe9e55f1 100644
--- a/third_party/android_data_chart/BUILD.gn
+++ b/components/precache/android/BUILD.gn
@@ -4,16 +4,18 @@
 
 import("//build/config/android/rules.gni")
 
-assert(is_android)
-
-android_resources("android_data_chart_java_resources") {
-  custom_package = "org.chromium.third_party.android"
-  resource_dirs = [ "java/res" ]
+# GYP: //components/precache.gypi:precache_java
+android_library("precache_java") {
+  deps = [
+    "//base:base_java",
+  ]
+  DEPRECATED_java_in_dir = "java/src"
 }
 
-android_library("android_data_chart_java") {
-  DEPRECATED_java_in_dir = "java/src"
+android_library("precache_javatests") {
   deps = [
-    ":android_data_chart_java_resources",
+    "//base:base_java_test_support",
+    ":precache_java",
   ]
+  DEPRECATED_java_in_dir = "javatests/src"
 }