Add PreserveLegacyHostTest to GTS

Bug: 203130175
Test: m gts && gts-tradefed run gts -m
GtsPreserveLegacyStorageHostTest

Change-Id: I0656033e03b05a6fb682678edb595ef30bfd9cee
Merged-In: I0656033e03b05a6fb682678edb595ef30bfd9cee
(cherry picked from commit fae189672ae2ac59045905dc8074650b468f198b)
3 files changed