Adjust avatar used for call streaming notification. am: 8a0898a7b6 am: fb2b1b085f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/23181934

Change-Id: I2d6acba9b8d07a69687342b23b3a37059f59a6ee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>