Mark ab/6881855 as merged am: 4ef5d6c472 am: cbf2cb0386

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libgsm/+/13112761

Change-Id: Ia6a10f869d13c8c9a7c2c3bf5aa52a5f8a2f3da0