Rework Exception Handling for IpSecManager

In order to properly support EOPNOTSUPP this CL
applies a consistent approach to handling Exceptions.
Hereafter, all exceptions that aren't of a special
method-specific type (such as SpiUnavailableException)
will all be returned to the calling process unchanged.
At the API call site, the ServiceSpecificException,
which is really an Errno, will be inspected and either
converted to an unchecked exception for types we know,
or it will be converted to an IOException in cases where
that method can return a checked exception. In cases
where we do not expect an errno, we will simply throw
a generic RuntimeException. This means all API calls
will now properly throw UnsupportedOperationException
and may be CTS tested accordingly.

Bug: 72420898
Test: runtest frameworks-net
Merged-In: I4a00e221618896223fcdb4b4279fb14cd14e34d8
Change-Id: I4a00e221618896223fcdb4b4279fb14cd14e34d8
(cherry picked from commit ddeb90aa)