Merge "Add README" am: 0a34762447

Original change: https://android-review.googlesource.com/c/platform/packages/apps/Dialer/+/2613992

Change-Id: Ibc9f6f552ff334260bdf27dc77a6fb0e84d295ac
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>