Mark two dalvik.system constants as stable core/platform API.

These values are used as the initializers for constants that are in
the public API (android.os.Debug.TRACE_COUNT_ALLOCS and
android.os.Build.VERSION_CODES.CUR_DEVELOPMENT). If they aren't
included in the stable core/platform API then switching from the
legacy to stable by default will cause the values to be dropped from
the .txt signature file for the public API, which would be an
undesirable change.

Test: m checkapi
Bug: 157640067
Change-Id: Id8d162e4e7b1e0ab081b494c4f5dc1e1e876b731
Merged-In: Id8d162e4e7b1e0ab081b494c4f5dc1e1e876b731
4 files changed