Merge "Adding the sdk_vars centralized file back to fix the ndk download page links" into mnc-mr-docs am: 77e85d32d6 am: 220f09fb4f
am: 9b22357c09

* commit '9b22357c098963fb791ee86434b31fab0d8523d2':
  Adding the sdk_vars centralized file back to fix the ndk download page links

Change-Id: I69362b0be69702e2be57873254ef6d4599dc16c6