am a4f1eb3d: am 9430f9d3: Merge "KeyStore: Update the parameters of generating master keys." into gingerbread

Merge commit 'a4f1eb3d775533d9b28248022e0a5b4ec05fc2e4'

* commit 'a4f1eb3d775533d9b28248022e0a5b4ec05fc2e4':
  KeyStore: Update the parameters of generating master keys.