Add AES-GCM key blob encryption. am: 11b57603d9 am: 78157454e4 am: c7a11e516d am: e7639dc356

Original change: https://android-review.googlesource.com/c/platform/system/keymaster/+/1674708

Change-Id: I7f9b9df129717c92434fc2420c863dedb9204fff