Merge "Accept null subtype in InputMethodSubtypeHandle." into nyc-dev am: d67a1ca49b am: 1f79c0fea1
am: 1241d67eff

* commit '1241d67eff7cf0fd20be4fca7c1a63c3679c541c':
  Accept null subtype in InputMethodSubtypeHandle.

Change-Id: I811104dab27ac95c401a88d5ef8b82e9a45eb9f2