Fold read_and_install_user_ce_key() into fscrypt_unlock_user_key() am:...

Fold read_and_install_user_ce_key() into fscrypt_unlock_user_key() am: fc1df0ea am: db7a017b am: 988342f5 am: 66fdfbcf

Original change: https://android-review.googlesource.com/c/platform/system/vold/+/2777076



Change-Id: Ia8f13fc2a170938524772a3b70fe475451adf619
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>