Use String instead of byte[] to represent alias in KeyEntryRecoveryData.

Bug: 66499222
Test: adb shell am instrument -w -e package \
com.android.server.locksettings.recoverablekeystore \
com.android.frameworks.servicestests/android.support.test.runner.AndroidJUnitRunner

Change-Id: Iac74fe856b43faa602ea1c2d9172f669826f4011
5 files changed