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

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

Change-Id: I0aa02611ae7393952155adc8dd5a05c4b282bbfc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>