Merge "Update Eigen metadata." am: 70bf30e28d

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

Change-Id: I2b1f24854148374b94ce8503f14434aabb8d09ee
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>