Merge "libbinder: save space for optional config options." am: 265e9e28 am: 6397f4d3

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2597523



Change-Id: Ia796b64387f625929b0ccf198a11e6a9cd5b4b14
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>