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