[GH] Bump metalava to 8670428
[GH] Bump metalava to 8670428

Test: cd appcompat && ./gradlew :annotation:annotation-experimental:checkApi
Change-Id: Ie8e1e575f945c5eee9f102c378e715ec2aa00136

This is an imported pull request from https://github.com/androidx/androidx/pull/416.

Resolves #416
Github-Pr-Head-Sha: f81bf4c314958542a02cd0bde1461601af64a253
GitOrigin-RevId: 14cb1839898de4be35be1227e53b0aef165c4e4c
Change-Id: I36f78be37b665f79addce3d5f1bdce49e240a4ec

androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,androidx/androidx,AndroidX/androidx,androidx/androidx,AndroidX/androidx,AndroidX/androidx,androidx/androidx