Merge "aconfig: document the dump --filter and --format arguments" into main...

Merge "aconfig: document the dump --filter and --format arguments" into main am: ed49df9a am: 4cd11e5e

Original change: https://android-review.googlesource.com/c/platform/build/+/3466706



Change-Id: I2f6ef31b8780312c8e0cf688976842859e90cdbf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>