Fix RecoverableKeyStore unit tests.

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: I19aeb444e2f99f698cd1f9dfa13215093f5230da
3 files changed