Do not use hidden API StorageManager.inCryptKeeperBounce

The API should always return false since FBE is required for all devices
launching Android 10:
https://source.android.com/compatibility/10/android-10-cdd.html#9_9_2_encryption_requirements

Bug: 141247460
Test: manaul
Change-Id: I8978b236525a25db06604dcdc20bede0ed1e50a6