Update to support staging behavior

The tzdatacheck binary is being modified to support
"staging" of an install / uninstall. tzdatacheck is now
responsible for making time zone distros "live" during
boot. It was previously the responsibility of the
TimeZoneDistroInstaller.

Bug: 31008728
Test: Manual testing
Test: CTS: run cts -m CtsHostTzDataTests

Change-Id: I1d390bf2b383a9505320e3455a20ae640bf83d7b