Add missing calls to key sync task in LockSettingsService

On my device at least this was never getting called. Not sure if both
of these are needed.

Test: adb shell am instrument -w -e package com.android.server.locksettings.recoverablekeystore com.android.frameworks.servicestests/android.support.test.runner.AndroidJUnitRunner
Change-Id: I693cf2f12a6d113b68dd4a8515aee97f4efb7b18