android: import build_overrides/build.gni rather than gclient_args.gni directly.

Tbr: bpastene@chromium.org
Bug: 978773
Change-Id: Ida9e14a36eb16ced91a38e48771b4087d0d23556
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1678943Reviewed-by: John Budorick <jbudorick@chromium.org>
Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: John Budorick <jbudorick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#672636}

build/android/BUILD.gn

@@ -4,8 +4,8 @@
 
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
-import("//build/config/gclient_args.gni")
 import("//build/config/python.gni")
+import("//build_overrides/build.gni")
 
 if (enable_java_templates) {
   sun_tools_jar_path = "$root_gen_dir/sun_tools_jar/tools.jar"