Merge "Adding the sdk_vars centralized file back to fix the ndk download page links" into mnc-mr-docs
am: 77e85d32d6

* commit '77e85d32d61ce3f0e356a789b8d2dcd907913c1b':
  Adding the sdk_vars centralized file back to fix the ndk download page links

Change-Id: Ib9d0ef5df501970bbca82b6ee59fb8e4c1959df0