Declare previous version when using frozen HALs

The KeyMint HAL has been updated to v4, but frozen builds (e.g. 25Q1)
remain on the previous version.  The core AIDL version is handled
automatically, but we also have a package manager flag whose value
is (100 * HAL-version).  Use `RELEASE_AIDL_USE_UNFROZEN` to switch
between `required` configs for that.

Test: TreeHugger
Bug: 377808462
Bug: 378026324
Change-Id: Id042bee2a81e8563e1029ea7bb43452715e3edee