Merge "Use canonical copy of ABSL for WebRTC dep." into main am: b6567484ba am: 59075dbbb8

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/3295012

Change-Id: Id8bb18a764b64f2c10284cd771e882c34d609a85
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>