Merge "Add README" am: 0a34762447 am: 61fb2fb909 am: 34ffae94a1 am: 4b4f786934

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

Change-Id: Ie06e6a6cb2deeaf15b6e6709204e08c2e983cd56
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>