Vts: New dice_policy_builder api with `TargetEntry`.

The policy building library changes in aosp/3125493, accordingly change
the function call. This does not change the behaviour or test coverage
of VTS.

Test: atest VtsSecretkeeperTargetTest
Bug: 291245237
Change-Id: I21a7b0abe5bf186893ec9a68bb080b41778d3313
2 files changed