Upgrade libcap to libcap-2.48 am: 257a1ceb21 am: a444fa3c9c am: 8b3c95bcfd am: ffea13c81d

Original change: https://android-review.googlesource.com/c/platform/external/libcap/+/1577304

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia7125cf971064433e4ccdd7ec7b8105e5c96b772