docs: Remove duplicated phrase am: c08a545a am: c09f2b6c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20759942



Change-Id: I7e4e3269344db963f52601c2185a01e59e52ffe5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>