Support configurable multi-stage UDFPS enrollment

Implements multi-stage enrollment for UDFPS. This implementation
supports both highlighting the progress bar when a help message is
received and configuring the progress thresholds between enroll stages
via an XML resource.

Test: Manual

Bug: 198928407
Bug: 200076382
Change-Id: Ied4dbcb4a523f477c5ca1a9146d24751c6473f35
Merged-In: Ied4dbcb4a523f477c5ca1a9146d24751c6473f35