Move other time config to ConfigurationInternal

Move other time detector config to ConfigurationInternal. This means
that all configuration, regardless of origin (settings, static config
xml, server flags, mixed) are accessed via ConfigurationInternal, not
from Environment, simplifying listening, enabling them to be more
dynamic in future, etc.

Bug: 172891783
Bug: 229740080
Test: atest com.android.server.timedetector android.app.time
Change-Id: I625e4fcfd6dd63ab4ebfb181611f977e8ad83f31