docs: Remove duplicated phrase am: c08a545a am: c09f2b6c am: 78ec6628

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



Change-Id: I19ef36e1106bcb81e6c95f4b9133adf487831141
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>