tree cb614474209298d9cf48f79952a0cf1c6f511c42
parent 43ec2b912e0ac8105e83c44a39e23a7a822139ea
author Adrià Vilanova Martínez <me@avm99963.com> 1626557571 +0200
committer Adrià Vilanova Martínez <me@avm99963.com> 1626564016 +0200

Cache thread avatars

This change adds the AvatarsDB class, which lets the threadListAvatars
feature interact with a cache of thread avatars.

This is an implementation of points 1 and 2 in the "Idea" section of the
following doc: go/eu7T9m (public link available in the linked bug). The
doc includes a rationale for this change and what it does.

Bug: 2
Change-Id: Ida9fcd909e3bd4a552361317b9013cb8734272a6