Upgrade metalava lint prebuilts to 31.2.0-alpha08

./update-metalava-lint-deps.sh 31.2.0-alpha08 286023667

Bug: 286023667
Test: m update-api
Change-Id: I9adbd1f64e373f10a1231728e4d0982a0e647d46
196 files changed
tree: 72a4cd66a93826c3f7d9acdb5810eba204969bf9
  1. com/
  2. .gitignore
  3. Android.bp
  4. METADATA
  5. update-metalava-lint-deps.sh