Merge "Adding make files with the new read-only product property ro.product.first_api_level for Android L, L MR1 and M." am: d5b8a2a5c0 am: e8a6c35785
am: 79b32b3481

* commit '79b32b3481d24d4d97976ac9c8459f35fb400c81':
  Adding make files with the new read-only product property ro.product.first_api_level for Android L, L MR1 and M.

Change-Id: I99b60d1612f54922ed682c095c3e44d06cc10e2a