docs: Remove duplicated phrase am: c08a545ad4

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

Change-Id: Ia68e67ed55dcbb30e3283933e5057389c31f4a70
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>