Merge "Adding the sdk_vars centralized file back to fix the ndk download page links" into mnc-mr-docs am: 77e85d32d6
am: 220f09fb4f

* commit '220f09fb4f6509bec1c344dda542fe3fd04cd997':
  Adding the sdk_vars centralized file back to fix the ndk download page links

Change-Id: I92dc8597a28eacf4d3766ee08473d56ab0e2c006