Remove wait_for_keymaster and references
No longer needed now init listens for property changes on a
separate thread.
Some references to wait_for_keymaster survive: in order to avoid
trouble downstream, we keep the definition of the `wait_for_keymaster`
and `wait_for_keymaster_exec` types, but remove all their permissions,
and of course prebuilds and compat cil files are unchanged.
Bug: 186580823
Test: Cuttlefish boots successfully
Change-Id: Id97fc2668743fb58dfd10c75a4f4c4d0348284ce
3 files changed
