docs: Fixed summary fragment and removed typo am: 8167356f3d am: f49e9792e1

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20835757

Change-Id: Ia902038df1725c20bd4f36f98cb5b267458b63e7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>