am 52ee9b99: am ffd0e8bf: am a6f32d7f: am 64d4ef8c: am 63889480: am 6530cca1: Fix "@null" resource values in LayoutLib. [DO NOT MERGE]

* commit '52ee9b99f55cd17c484fcaf2433c688967284468':
  Fix "@null" resource values in LayoutLib. [DO NOT MERGE]