Merge "Add getKeyCharacteristics method to KeyMint" am: 8b25958b75 am: 08e40ff4cc am: c45edf9eb4 am: b7d7e97f49

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1690690

Change-Id: I94afbd095bb698385e031e5754f3658f69f7761b