Clean up obsolete android AVD confgs and all the references.

As for API level >= 28, we switched to a new naming scheme which can
be found in tools/android/avd/proto/README.md

Bug: 350107809
Change-Id: I337e372972826f252143439b49cedb618dfb4650
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5671062
Commit-Queue: Haiyang Pan <hypan@google.com>
Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1323006}
NOKEYCHECK=True
GitOrigin-RevId: 56581b3b88b94411d732feab7c9e921135cebfa0
9 files changed