Update change annotations and pull missing OpenJDK8u121-b13 change

Added missing android-changed annotations to ObjectStreamClass
and ObjetStreamField. Minimized changes between upstream and libcore.
Pulled in missing ObjectStreamClass change:

changeset:   11122:7c1d34773aa6
user:        igerasim
date:        Tue Jun 30 15:53:18 2015 +0300
summary:     8103671: More objective stream classes

Bug: 37313756
Test: CtsLibcoreTestCases
Change-Id: I91c0a82b95d498a474aeca3b1439eb5480c35f4b
2 files changed