Merge "Added forward declaration for compilation" am: 233a5a162d

Original change: https://android-review.googlesource.com/c/platform/system/core/+/2516555

Change-Id: I512fcda4f9b2e98812a96143bc4ebed477e29209
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>