[BiometricsV2] Fix 2nd touch not work for enroll

Use MessageDisplayController only when enroll reason is ENROLL_ENROLL
and R.bool.enrollment_message_display_controller_flag is true.
And always allocate a new MessageDisplayController for each new enroll
to avoid the possibility of events being ignored by
MessageDisplayController.

Bug: 275510856
Test: atest FingerprintEnrollProgressViewModelTest
Test: manually test sfps/udfps enrollment for biometricsV2
Change-Id: Ifc8b91916a3d76bed68dc523a90dc6ba422e3923