Add user_type field and log it in Launcher

Add new field user_type to decouple
work_profile and private_space users.
Deprecate is_work boolean field.

Bug: 312200869
Test: statsd_testdrive 19, output: https://paste.googleplex.com/5912695996416000
Flag: NA
Change-Id: Idc25f341b4353a85b8a93eab97c88195895baedc