Merge "Improve am --help wording" into main am: 3b84c2ca31

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2787105

Change-Id: I49aed3aaf06bc3e61bf5fcd587b50f1ec6e11cd7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>