Update arrayvec to 0.7.6

Bug: http://b/339424309, http://b/367707312
Test: treehugger
Change-Id: I3b8b7bda346ecdc3045a165f1ed14c8a4082c2ef
11 files changed
tree: d24a3c945be4b886f810bd11286dfa4268dfb5c8
  1. crates/
  2. pseudo_crate/
  3. .gitignore
  4. METADATA
  5. OWNERS
  6. PREUPLOAD.cfg