Merge "Update Eigen metadata." am: 70bf30e28d am: 96900fb9a6 am: b9c41e0824

Original change: https://android-review.googlesource.com/c/platform/external/eigen/+/2176530

Change-Id: I597c5228103e244d334760e78c5074114a4f453b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>