Improve the Validation of IpSecAlgorithm by
explicitly checking the length in addition to
the truncation length (previously an oversight).
In addition, we now check the lengths during
un-parceling, which will catch someone maliciously
manually building a parcel and passing it, bypassing
the checks in the constructor.
Bug: 68780091
Test: runtest -x IpSecAlgorithmTest.java
Change-Id: I8172762617264d34f47d5144336464510f07a701
Add equality testing methods to support tests
for parceling and un-parceling IpSecConfig.
Bug: 38397094
Test: runtest -x IpSecConfigTest.java
Change-Id: I31e318334d39ed6e9daf5ec8f3be7dcec75e12ad
