Convert file_paths.xml to a resource template.

This is needed by downstream for conditional statement.

Change-Id: I8dd2ed99306f308279a3cce2b3ec35d2edec285c
Reviewed-on: https://chromium-review.googlesource.com/994792Reviewed-by: Ted Choc <tedchoc@chromium.org>
Commit-Queue: Rudy Xie <rudyxie@google.com>
Cr-Commit-Position: refs/heads/master@{#549103}

chrome/android/BUILD.gn

@@ -785,6 +785,7 @@ android_assets("chrome_public_locale_pak_assets") {
 
 jinja_template_resources("chrome_public_apk_template_resources") {
   resources = [
+    "java/res_template/xml/file_paths.xml",
     "java/res_template/xml/launchershortcuts.xml",
     "java/res_template/xml/searchable.xml",
     "java/res_template/xml/syncadapter.xml",
@@ -795,6 +796,7 @@ jinja_template_resources("chrome_public_apk_template_resources") {
 
 jinja_template_resources("chrome_sync_shell_apk_template_resources") {
   resources = [
+    "java/res_template/xml/file_paths.xml",
     "java/res_template/xml/launchershortcuts.xml",
     "java/res_template/xml/searchable.xml",
     "java/res_template/xml/syncadapter.xml",