CMakeLists changes to enable libtorch for Android (#19762)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/19762
ghimport-source-id: 287aa7fea4efd38994e14d794123eb2046b91fc0
Differential Revision: D15087653
Pulled By: ljk53
fbshipit-source-id: 4498ff9f7f7903c3e25541184302b811267958e9
