Minor updates to BIND_ALLOW_FREEZE

BIND_ALLOW_FREEZE is not ready for use outside of the system and can
result in apps breaking themselves by mistake.

Also removing it from BIND_REDUCTION_FLAGS as this is no longer meant to
be a dynamic flag. If the client goes through LRU changes, it is better
to have those propagated to the remote service as well.

Test: atest CtsAppTestCases:ServiceTest#testBindAllowFreezeProhibited

Flag: NONE changes are to an existing BIND_FLAG that is not used
anywhere yet.

Bug: 393149737
Change-Id: I3e56755e95962f4c4b60a7732dc99595110eb38e